How to Make a Waterproof Sleeping Bag Cover

Imagine this: you’re in the middle of a remote forest, the rain is pouring down, and you’re cozy inside your sleeping bag, but your cover isn’t holding up. Instead of waking up damp and cold, imagine staying perfectly dry and comfortable. That’s the magic of a well-made waterproof sleeping bag cover. In this guide, we’ll explore how to create your own cover that keeps you dry no matter the weather, using materials and techniques that won’t break the bank.

Understanding the Need

A waterproof sleeping bag cover is not just an accessory—it’s an essential piece of gear for any serious outdoor enthusiast. Whether you’re hiking through the Pacific Northwest or camping in the Alps, staying dry is crucial. The right cover can also extend the life of your sleeping bag by protecting it from dirt, moisture, and wear.

The first step is understanding why waterproofing matters. Sleeping bags are designed to keep you warm by trapping heat, but they become ineffective if they get wet. Water can come from rain, dew, or even the ground if you’re not on a well-pitched tent floor. A waterproof cover acts as a barrier, preventing moisture from reaching your sleeping bag and ensuring you stay warm and dry.

Materials You’ll Need

Creating a waterproof cover requires specific materials to ensure effectiveness and durability. Here’s what you need:

1. Waterproof Fabric: Nylon or polyester with a waterproof coating like silicone or polyurethane is ideal. These materials are lightweight, durable, and provide excellent water resistance.
2. Seam Tape: Used for sealing seams to prevent leaks. Look for high-quality tape that matches the fabric you’re using.
3. Elastic Cord: For creating a secure fit around the sleeping bag’s edges. This will help in adjusting the cover to various bag sizes.
4. Waterproof Coating Spray: An additional layer of protection can be added with a spray designed for fabrics. This helps maintain the waterproof qualities over time.
5. Thread and Sewing Machine: To stitch the fabric pieces together. Ensure the thread is strong and durable.

Step-by-Step Construction

1. Measuring and Cutting

Start by measuring your sleeping bag to determine the dimensions for your cover. It’s essential to add a few extra inches on all sides to ensure a good fit and room for adjustments.

Tip: To avoid any surprises, measure twice and cut once. Accuracy here saves you time and prevents wasted materials.

Cut the fabric according to these measurements. You'll need one large piece that will wrap around the entire sleeping bag and additional fabric for the bottom and top flaps.

2. Sewing the Pieces Together

Lay out your fabric pieces and start by sewing the sides together. Make sure to use a waterproof thread and a sewing machine with a walking foot, which helps handle thick fabrics and prevents slipping.

Important: Leave openings at both ends of the cover where the elastic cord will be inserted.

3. Applying Seam Tape

After sewing, use seam tape to seal all the seams. This step is crucial for ensuring that water doesn’t seep through the stitches. Apply the tape along the seams according to the manufacturer’s instructions, ensuring a tight seal.

4. Adding the Elastic Cord

Thread the elastic cord through the openings you left at both ends. This cord will allow you to cinch the cover around your sleeping bag, making it a snug fit. Tie the cord securely, and adjust to fit your sleeping bag snugly.

Pro Tip: Adding cord locks can help you adjust the tension of the elastic cord easily.

5. Applying Waterproof Coating

To boost the waterproofing, apply a waterproof coating spray to the entire cover. Follow the manufacturer’s instructions for the best results, and allow the cover to dry completely before using it.

Testing and Adjustments

Before heading out on your adventure, it’s crucial to test your cover. Try it out in a controlled environment, such as a backyard or a bathroom, where you can simulate rainy conditions. Place your sleeping bag inside and pour some water over it to check for leaks.

Adjust as needed: If you find any leaks, apply additional seam tape or reapply waterproof coating. Ensure that the cover fits snugly and that all seams are securely sealed.

Maintenance and Care

Maintaining your waterproof cover is essential for its longevity. After each use, clean it according to the fabric care instructions. Store it in a dry, cool place to prevent mildew and deterioration.

Regularly reapply waterproof coating as needed, especially if you notice any decline in performance. This will help maintain the cover’s effectiveness over time.

Conclusion

Creating a waterproof sleeping bag cover might seem daunting, but with the right materials and techniques, it’s entirely achievable. By following these steps, you’ll ensure that you stay dry and comfortable on your outdoor adventures.

Remember, the key to a successful waterproof cover is precision in your measurements and attention to detail in your construction. With a bit of effort, you can create a cover that will enhance your outdoor experiences and keep you dry no matter where you go.