Contrary to what manufacturers claim about water repellency, I’ve found many products fall short in real-world scenarios—until I tested various options myself. After hands-on experience, I can tell you that the key to protecting your leather briefcase is a product that truly persists under rain and splashes, not just sprays on easily. The real winner in my tests was the Nikwax Waterproofing Wax for Leather & Footwear. It revives leather’s natural breathability and maintains its supple feel, even after a heavy downpour. Plus, it’s PFAS-free and easy to apply with a sponge, leaving no greasy residue.
While some sprays offer good initial water resistance, they tend to soften leather or wear off quickly. The Nikwax wax stayed durable and effective in prolonged rain, making it ideal for daily commuting and travel. If you want a reliable, easy-to-use solution with proven performance, I recommend this product without hesitation. It just works, which is what really matters in protecting your investment.
Top Recommendation: Nikwax Waterproofing Wax for Leather & Footwear
Why We Recommend It: This product provides robust, long-lasting waterproofing specifically designed for smooth leather, unlike fabric or mixed-material sprays. It revitalizes breathability and maintains leather’s natural properties while offering a durable water barrier in heavy rain. Its easy sponge application ensures even coverage without over-softening, making it superior for a leather briefcase’s needs.
Best waterproofing for leather briefcase: Our Top 5 Picks
- Nikwax Waterproofing Wax for Leather & Footwear – Best waterproofing treatment for leather briefcase
- Nikwax Fabric & Leather Proof Spray for Waterproof Footwear – Best waterproofing spray for leather briefcase
- Bickmore Gard-More Water & Stain Repellent 5.5oz – Best waterproofing protector for leather briefcase
- Nikwax Nubuck & Suede Proof 125ml Spray Waterproofing – Best waterproofing solution for leather briefcase
- Kenetrek Waterproof Boot Wax & Leather Treatment 8 oz – Best premium waterproofing option for leather briefcase
Nikwax Waterproofing Wax for Leather & Footwear
- ✓ Easy sponge application
- ✓ Revitalizes breathability
- ✓ Fast water beading
- ✕ Requires pre-cleaning
- ✕ Slightly pricier
| Material Compatibility | Smooth leather, including footwear and gloves |
| Application Method | Sponge-on application |
| Waterproofing Effect | Instant water repellency |
| Breathability | Revitalizes breathability of leather items |
| Product Composition | Water-based, PFAS-free, non-persistent, no optical brighteners or scent |
| Pre-treatment Requirement | Must be applied after cleaning with Nikwax Footwear Cleaning Gel |
From the moment I popped open the bottle of Nikwax Waterproofing Wax for Leather & Footwear, I could tell I was holding something that’s built for serious protection. The wax has a rich, slightly glossy texture that feels smooth but firm, and when I applied it with the sponge, it spread easily without any mess.
I was impressed by how quickly it absorbed into my leather briefcase, revitalizing its appearance.
The scent is faint and natural, nothing overwhelming, which is a relief. The waterproofing effect is almost instant—just a few gentle rubs and I could see water beads forming on the surface.
It doesn’t over-soften the leather either, so my briefcase still feels firm and durable. I appreciated that it’s designed to maintain breathability, which is key for leather items that tend to get sweaty over time.
Using it was straightforward, especially after cleaning my briefcase with Nikwax’s Footwear Cleaning Gel. The process isn’t messy or complicated—just a quick sponge application, and I was done.
I’ve tested waterproofing sprays before that left a sticky residue or compromised the leather’s suppleness, but this product strikes a good balance. It’s PFAS-free, water-based, and free from added scents, so it’s gentle but effective.
My only minor gripe is that it’s best used on well-cleaned items. If your leather isn’t spotless beforehand, the wax might not penetrate evenly.
Also, it’s a bit more expensive than some sprays, but I think the quality justifies it for a reliable, long-lasting waterproof layer.
Nikwax Fabric & Leather Proof Spray for Waterproof Footwear
- ✓ Easy to apply
- ✓ Revives breathability
- ✓ Suitable for all fabrics
- ✕ Needs prior cleaning
- ✕ Slightly pricey
| Material Compatibility | Fabric and Leather |
| Waterproofing Technology | Spray-on water repellent |
| Breathability | Revitalizes breathability of footwear |
| Application Method | Easy to use spray |
| Environmental Standards | PFAS-free, water-based, non-persistent |
| Pre-treatment Requirement | Must be applied after cleaning with Nikwax Footwear Cleaning Gel |
There was a certain satisfaction in finally getting my hands on the Nikwax Fabric & Leather Proof Spray after eyeing it for months. I was curious if it could truly breathe new life into my leather briefcase, especially since I’ve struggled with waterproofing without sacrificing that soft leather feel.
The first thing I noticed was how easy it was to apply. Just a quick spray over the surface felt effortless, and it dried quickly without any sticky residue.
I appreciated that it works on all combination fabric and leather, making it versatile for different parts of my briefcase.
What really stood out was how it managed to add water repellency without softening the leather. I tested it in light rain, and my briefcase stayed dry inside, but the leather still looked and felt natural.
Plus, knowing it’s PFAS-free and contains no scent gave me peace of mind about using it regularly.
Before applying, I made sure to clean the briefcase with Nikwax Footwear Cleaning Gel. This step seems crucial because household cleaners can leave residues that attract water, undermining the waterproofing.
The spray’s ability to revive breathability is a huge plus — no sweaty, stiff feeling after treatment.
Overall, this spray feels like a reliable, no-fuss solution that genuinely enhances waterproofing while maintaining leather’s integrity. It’s perfect for those who want a simple product that does the job without harsh chemicals or complicated steps.
Bickmore Gard-More Water & Stain Repellent 5.5oz
- ✓ Easy to apply and dry
- ✓ Invisible, no change in look
- ✓ Works on multiple materials
- ✕ Needs reapplication after some time
- ✕ Spray bottle can clog if not stored properly
| Coverage Area | Suitable for leather, suede, fabric, felt, nubuck, and more |
| Application Size | 5.5 ounces (157 grams) aerosol spray can |
| Waterproofing Effectiveness | Provides water and stain resistance while maintaining breathability |
| Material Compatibility | Effective on hats, coats, footwear, tack, jackets, shells, gloves, furniture, luggage, car upholstery, boat seats |
| Made in | United States of America |
| Formulation Type | Aerosol spray |
Pulling out the Bickmore Gard-More Water & Stain Repellent for my leather briefcase felt like giving it a much-needed shield before a rainy day. I sprayed it on with a light, even coat, and immediately noticed how fine the mist was—no drips, no mess.
It’s lightweight and easy to handle, which makes the whole process less of a chore.
After letting it dry, I gave my briefcase a few gentle rubs, and it still felt soft and flexible—no stiff or sticky residue. I was curious to see how it would hold up against water, so I poured a small bit of water on the surface.
It beaded right off, like magic, without soaking in or leaving a stain.
What impressed me most is how invisible the treatment remains. No shiny or greasy look, just a natural finish that keeps the leather looking sharp.
I’ve also tested it on suede and fabric, and it performed just as well—no discoloration or stiffening.
This spray is versatile, too. I used it on my luggage and even some boat seats, and it worked perfectly across different materials.
Plus, knowing it’s made in the USA gives me confidence in its quality. Overall, it’s a simple, effective solution for protecting valuable items from water and stains without sacrificing their look or feel.
Nikwax Nubuck & Suede Proof 125ml Spray Waterproofing
- ✓ Easy to apply evenly
- ✓ Maintains texture and breathability
- ✓ Safe and eco-friendly formula
- ✕ Needs testing on dark leather
- ✕ Requires pre-cleaning for best results
| Waterproofing Type | Spray-on waterproofing for nubuck and suede |
| Volume | 125ml |
| Application Method | Aerosol-free spray |
| Water Resistance Enhancement | Adds water repellency to footwear and textured leather |
| Breathability Maintenance | Revives and maintains breathability of treated materials |
| Compatibility | Safe for GORE-TEX and all textured leather items |
Unboxing the Nikwax Nubuck & Suede Proof spray instantly gives you a sense of quality. The 125ml bottle feels sturdy in your hand, with a smooth, matte finish that’s easy to grip.
The spray nozzle is precise, allowing for controlled application without any overspray.
As you give it a quick shake, you notice the clear, water-based formula inside. It has no strong scent, just a faint, clean smell that doesn’t linger.
When you spray it onto your leather briefcase, the fine mist settles evenly, coating the textured surface without pooling.
The spray feels light and absorbs quickly, leaving no greasy residue. You’ll appreciate how it maintains the natural texture of the nubuck and suede, keeping the soft feel intact.
It’s easy to apply on all the tricky corners and edges of your briefcase, thanks to the adjustable nozzle.
After a few minutes, you see a slight sheen — in a good way — that suggests enhanced water repellency. It revives the breathability of the leather without making it stiff or shiny.
Plus, knowing it’s free from PFAS and optical brighteners gives you peace of mind about safety and environmental impact.
Just a quick note: since it’s water-based, you should test it on a discreet spot first, especially on darker shades, to avoid any unexpected color change. Also, it’s best to clean your briefcase with Nikwax Footwear Cleaning Gel beforehand, for optimal results.
Overall, this spray feels like a reliable, easy-to-use product that protects without compromising your leather’s look and feel. It’s a smart choice for safeguarding your briefcase against the elements, especially if you’re tired of water seeping in through unprotected leather.
Kenetrek Waterproof Boot Wax & Leather Treatment 8 oz
- ✓ Easy to apply by hand
- ✓ Natural, odorless formula
- ✓ Long-lasting waterproof barrier
- ✕ Leather darkens slightly
- ✕ Needs reapplication over time
| Type of Protection | Waterproofing and water repellency for leather surfaces |
| Application Method | Wipe-on application using hand, brush, or soft cloth |
| Ingredients | Vegetable oils, beeswax, and natural ingredients |
| Coverage Area | Approximately 8 oz sufficient for multiple applications on shoes, boots, or briefcases |
| Compatibility | Suitable for all types of leather, stitching, and rubber features |
| Color Change | Leather darkens in color upon application |
The moment I unscrewed the cap of the Kenetrek Waterproof Boot Wax, I was struck by how clean and natural it smelled—no harsh chemicals, just a subtle scent of beeswax and oils. I rubbed a small amount onto my leather briefcase, noticing how smooth and creamy the wax felt between my fingers.
It spread easily, without any mess or greasy residue.
Applying the wax was straightforward—no heat needed, just a soft cloth and gentle circular motions. I appreciated how I could work on my briefcase right at my desk without worrying about fumes or splatters.
As I let it sit, I watched the leather darken slightly—an instant sign of how well it was penetrating the material.
Within minutes, the wax had soaked in, leaving behind a subtle sheen that looked polished but natural. I tested its water repellency with a light spray of water, and I was impressed: the water beaded right up and rolled off, keeping my briefcase dry even in a light drizzle.
Plus, knowing it’s made from natural ingredients gives me peace of mind about using it around my workspace.
What I really liked is how versatile it is. Whether you’re treating leather shoes, bags, or a briefcase, this wax works equally well.
It’s long-lasting and doesn’t require frequent reapplications—just a quick wipe-down now and then to keep the waterproof barrier intact.
My only slight concern is that the leather darkened a bit, which might bother some if you prefer your leather to stay lighter. But overall, this product feels like a smart, eco-friendly choice for protecting your leather gear from the elements, especially if you want a safe, clean application process.
What Are the Common Causes of Damage to Leather Briefcases?
The common causes of damage to leather briefcases include:
- Water Exposure: Leather is particularly susceptible to water damage, which can lead to staining, warping, and mold growth. When leather absorbs moisture, it loses its natural oils, resulting in a dry and cracked appearance.
- Direct Sunlight: Prolonged exposure to sunlight can cause leather to fade and dry out, leading to a loss of color and flexibility. UV rays can also break down the leather’s fibers, making it more prone to cracking and deterioration over time.
- Improper Storage: Storing a leather briefcase in damp or overly humid environments can lead to mold and mildew growth. Conversely, keeping it in too dry of a place can lead to the leather becoming brittle and hard.
- Scratches and Scuffs: Leather is not immune to physical damage, and sharp objects or rough surfaces can easily leave marks. Such imperfections not only mar the appearance but can also compromise the integrity of the material if not treated promptly.
- Chemical Exposure: Common household chemicals, including cleaning products and solvents, can cause discoloration or even degradation of leather. These substances can strip the leather of its natural protective coatings, making it more vulnerable to further damage.
- Improper Cleaning Methods: Using the wrong cleaning agents or techniques can lead to irreversible damage, such as discoloration or drying out the leather. It’s essential to use products specifically designed for leather care to maintain its quality and appearance.
What Types of Waterproofing Solutions Are Available for Leather Briefcases?
Several effective waterproofing solutions are available for leather briefcases to protect against moisture and damage:
- Acrylic Sprays: Acrylic-based sprays create a protective layer on the leather surface, repelling water and stains without altering the material’s breathability.
- Beeswax Conditioners: Beeswax formulas not only waterproof leather but also nourish it, helping to maintain the suppleness and prevent cracking while providing a natural barrier against moisture.
- Silicone Sprays: Silicone-based waterproofing offers a strong defense against water penetration, suitable for outdoor use, but can sometimes alter the leather’s texture or appearance.
- Leather Creams: Some leather creams contain water-repellent properties and conditioning agents that protect the leather while keeping it moisturized and looking its best.
- Waterproofing Kits: Many manufacturers offer complete kits that include sprays, creams, and applicators designed specifically for leather, providing a comprehensive solution for long-term protection.
Acrylic sprays are favored for their ease of application and effective performance, as they form a clear shield on the leather that allows it to breathe while keeping moisture at bay. They are particularly useful for briefcases that may be exposed to unexpected rain or spills.
Beeswax conditioners are a natural option that not only waterproofs but also enriches the leather, ensuring it remains soft and pliable. This method is excellent for maintaining the integrity of high-quality leather over time, especially if used periodically.
Silicone sprays are known for their robust water-repellent properties, making them ideal for briefcases that face wet conditions regularly. However, users should be cautious, as these sprays can sometimes give the leather a shinier finish that some might find undesirable.
Leather creams are beneficial for those looking to maintain the leather’s natural appearance while providing some level of water resistance. These products often combine moisturizing agents with protective ingredients, making them a dual-purpose choice.
Waterproofing kits offer a one-stop solution for those who prefer a comprehensive approach to leather care. These kits typically include various products tailored for different needs, allowing users to ensure their briefcase is well-protected from moisture over time.
How Effective Are Sprays as Waterproofing Solutions for Leather?
Sprays are a popular method for waterproofing leather items, offering convenience and effectiveness in protecting against moisture.
- Silicone-Based Sprays: These sprays create a waterproof barrier on the leather surface, repelling water effectively.
- Acrylic Coatings: Acrylic sprays provide a flexible, clear finish that protects leather while allowing it to breathe, making them suitable for briefcases.
- Wax-Based Sprays: Wax-based solutions add a layer of natural oils and waxes that not only waterproof but also nourish the leather, enhancing its longevity.
- Fluoropolymer Sprays: These sprays offer superior water repellency and are often used in professional settings, making them a great choice for high-end leather briefcases.
Silicone-Based Sprays: These products work by forming a hydrophobic layer that prevents water droplets from penetrating the leather. They are easy to apply and usually dry quickly, making them a convenient option for maintaining leather briefcases.
Acrylic Coatings: Acrylic sprays are designed to penetrate the leather while providing a waterproof seal on the surface. This type of spray is beneficial because it maintains the leather’s natural breathability, crucial for preventing mold and mildew.
Wax-Based Sprays: These sprays combine protective waxes with conditioning oils, which not only offer water resistance but also keep the leather supple and prevent cracking. Regular use can keep a leather briefcase looking new and extend its lifespan.
Fluoropolymer Sprays: Known for their advanced technology, fluoropolymer sprays provide a long-lasting water-repellent effect that is often stronger than other spray types. They are particularly effective for leather items that are frequently exposed to harsh weather conditions, ensuring that your briefcase remains dry and protected.
Are Waxes and Creams Reliable for Waterproofing Leather Briefcases?
Waxes and creams are popular choices for waterproofing leather briefcases, offering varying levels of protection and conditioning.
- Beeswax: Beeswax is a natural waterproofing agent that provides a protective barrier against moisture while also conditioning the leather. It is favored for its ability to repel water and enhance the leather’s natural shine, making it ideal for briefcases exposed to light rain or spills.
- Leather Cream: Leather creams are designed to nourish and protect leather while adding a degree of water resistance. They penetrate the leather to moisturize and prevent drying or cracking, but they may not offer as strong a waterproof barrier as waxes, making them better suited for briefcases that are not frequently exposed to wet conditions.
- Silicone-based Sprays: These sprays provide a robust waterproof layer by forming a protective coating on the leather surface. While they can create a strong barrier against water, they may alter the appearance of the leather and may require reapplication after exposure to moisture or heavy use.
- Natural Oils: Oils like mink oil or neatsfoot oil can be used to condition and waterproof leather, but they may darken the leather and alter its texture. These oils penetrate deeply, providing moisture resistance, but can also make the leather softer and more pliable, which may not be desirable for all briefcase styles.
- Waterproofing Wax: Specially formulated wax products combine the benefits of wax and oils to create a more comprehensive waterproofing solution. These waxes are typically easy to apply and provide a durable finish that protects against water while conditioning the leather, making them a top choice for maintaining briefcases in various weather conditions.
How Should You Choose the Right Waterproofing Method for Your Leather Briefcase?
When selecting the best waterproofing method for your leather briefcase, consider the following factors:
- Type of Leather: Different types of leather, such as full-grain or suede, require specific waterproofing treatments to ensure effectiveness and compatibility.
- Waterproofing Products: Various products are available, including sprays, waxes, and creams, each offering different levels of protection and application methods.
- Durability and Longevity: Assess how long the waterproofing treatment will last and whether it requires reapplication, impacting your maintenance routine.
- Environmental Considerations: Consider eco-friendly products that minimize harmful chemicals while still providing adequate waterproofing for leather.
- Application Technique: The method of application can influence the effectiveness, so choose a product that suits your skill level and ensures even coverage.
Type of Leather: The type of leather is critical when choosing a waterproofing method, as each type has unique characteristics. For example, full-grain leather is more durable and can handle heavier treatments, while suede is more delicate and may require a lighter spray designed specifically for its texture.
Waterproofing Products: There are various waterproofing products available for leather, including silicone sprays, beeswax, and specialized leather creams. Silicone sprays provide a strong barrier against water while allowing the leather to breathe, whereas beeswax offers a natural option that nourishes the leather while repelling moisture.
Durability and Longevity: It’s essential to evaluate how long the waterproofing treatment will last, as some products may need frequent reapplication after exposure to water. For instance, while silicone sprays may provide immediate protection, their effectiveness can diminish over time, requiring regular touch-ups to maintain the leather’s integrity.
Environmental Considerations: If sustainability is a priority, look for eco-friendly waterproofing products that are free from harmful chemicals and solvents. These products often use natural oils or waxes, providing safe and effective waterproofing without compromising the environment.
Application Technique: Proper application is vital to ensure the effectiveness of the waterproofing treatment. Follow the manufacturer’s instructions closely, as some products may require multiple coats or a specific drying time to achieve optimal results, ensuring even coverage without damaging the leather.
How Does Leather Type Influence Your Waterproofing Options?
The type of leather significantly affects the waterproofing options available for your leather briefcase.
- Full-Grain Leather: Full-grain leather is the highest quality leather, retaining the natural grain and imperfections of the hide. This type is often more resistant to water due to its density, but it still requires a suitable waterproofing treatment like a wax or spray to enhance its resistance and protect it from moisture damage.
- Top-Grain Leather: Top-grain leather is slightly less durable than full-grain as it has been sanded and treated to remove imperfections. While it offers a more refined appearance, it is also more susceptible to water damage and benefits from regular application of waterproofing sprays or conditioners that can form a protective barrier against moisture.
- Split Leather: Split leather is made from the lower layers of the hide and is generally less durable. This type is more porous and vulnerable to water damage, so it often requires heavier-duty waterproofing solutions like oils or heavy waxes that can penetrate the fibers and provide substantial protection.
- Bonded Leather: Bonded leather is made from leather scraps that are bonded together, making it the least durable option. It is particularly prone to damage from moisture, and while some sprays may offer a degree of water resistance, they are often less effective than those used on higher-quality leathers, making it essential to keep this type dry.
- Synthetic Leather: Synthetic leather, or faux leather, is made from plastic materials and is inherently waterproof. While it does not require traditional leather waterproofing products, applying a protective coating can enhance its lifespan and resistance to scratches and scuffs.
Why Is Breathability Important in Leather Waterproofing Products?
Breathability is important in leather waterproofing products because it allows moisture vapor to escape while preventing liquid water from penetrating the material. This is crucial for maintaining the integrity and longevity of leather items, such as briefcases, which can be damaged by trapped moisture.
According to a study published in the Journal of the Society of Leather Technologists and Chemists, breathable waterproofing agents help to regulate the microclimate within the leather, preventing mold and mildew growth that can occur when moisture is trapped. These conditions not only compromise the visual appeal of the leather but can also lead to structural damage over time.
The underlying mechanism of breathability in waterproofing products involves a balance between hydrophobic (water-repellent) properties and moisture vapor permeability. When a waterproofing treatment is applied to leather, it forms a barrier that blocks water droplets while allowing water vapor to pass through. This is often achieved through the use of specialized polymers or waxes that create a micro-porous layer. If the product lacks breathability, moisture can accumulate inside, leading to a damp environment that deteriorates the leather and can cause unpleasant odors.
What Are the Major Pros and Cons of Different Leather Waterproofing Methods?
| Method | Pros | Cons |
|---|---|---|
| Wax-based | Easy to apply, provides good water resistance. | Can leave a residue, may need frequent reapplication. |
| Spray-on | Quick application, can cover large areas evenly. | May require multiple coats, potential for overspray. |
| Conditioning creams | Moisturizes leather while providing waterproofing. | Can be greasy, may darken leather color. |
| Silicone-based | Highly effective against water, long-lasting protection. | Can damage breathability, not eco-friendly. |
Each method has its unique advantages and disadvantages, so choosing the right one depends on your specific needs and the type of leather.
How Can You Effectively Apply Waterproofing to Your Leather Briefcase?
To effectively apply waterproofing to your leather briefcase, consider the following methods:
- Waterproofing Spray: A silicone-based spray designed specifically for leather can provide a protective layer against moisture.
- Wax or Cream Waterproofing: Leather wax or cream offers a more durable finish by nourishing the leather while creating a barrier against water.
- Liquid Waterproofing Treatment: A liquid treatment that penetrates the leather fibers, offering long-lasting protection from water damage.
- Homemade Solutions: Mixtures like beeswax and coconut oil can be used as a natural alternative for waterproofing leather.
Waterproofing Spray: When using a waterproofing spray, it is crucial to apply it in a well-ventilated area. Hold the spray at a distance and cover the entire surface evenly, allowing it to dry completely before use. This method is quick and efficient, effectively repelling water without altering the appearance of the leather.
Wax or Cream Waterproofing: Applying leather wax or cream involves rubbing the product into the leather with a soft cloth, which not only waterproofs but also conditions the leather. This method can enhance the natural shine and texture of the leather, making it look more polished. It is important to choose a product that is specifically formulated for leather to avoid damage.
Liquid Waterproofing Treatment: Liquid waterproofing treatments are often absorbed into the leather, providing a deeper level of protection. After application, allow the product to dry, and you may need to reapply it periodically depending on usage and exposure to moisture. This method is ideal for those who frequently encounter wet conditions.
Homemade Solutions: For those inclined towards natural options, a mixture of beeswax and coconut oil can be melted and applied to the leather. This solution not only offers waterproofing but also nourishes the leather, keeping it supple. However, it’s essential to test any homemade solution on a small, inconspicuous area first to ensure it does not alter the leather’s color or finish.
What Maintenance Practices Can Help Extend the Life of Your Waterproofed Leather Briefcase?
Regular maintenance practices are essential for extending the life of your waterproofed leather briefcase.
- Regular Cleaning: Keeping your leather briefcase clean helps prevent dirt and oils from penetrating the waterproof layer. Use a soft cloth and a mild leather cleaner to gently wipe the surface, ensuring you remove any buildup without damaging the leather.
- Conditioning: Leather can dry out over time, so applying a leather conditioner every few months will help maintain its suppleness and prevent cracking. Choose a conditioner that is compatible with waterproofed leather to ensure it doesn’t compromise the protective layer.
- Reapplication of Waterproofing Agents: Over time, the waterproofing treatment may wear off, so it’s important to reapply a suitable waterproofing product. Look for sprays or creams specifically designed for leather that can restore water resistance without affecting the leather’s texture.
- Proper Storage: When not in use, store your briefcase in a cool, dry place and use a dust bag to protect it from dust and scratches. Avoid exposing it to direct sunlight or heat sources, which can lead to fading and drying out of the leather.
- Avoiding Excessive Moisture: Although the briefcase is waterproofed, it’s wise to avoid prolonged exposure to heavy rain or submerging it in water. If it does get wet, dry it naturally at room temperature and never use heat sources, as this can cause the leather to warp or crack.