Quick Answer
To use a Mylar bivvy in wet conditions, dry out the bivy using body heat and a makeshift drying rack, then seal it with tape and use a fire or a portable stove to warm it up. This will help restore its waterproof properties. Use a tarp or a ground cloth to protect the bivy from further moisture.
Preparing the Bivvy
Before using your Mylar bivvy in wet conditions, prioritize drying it out. This can be achieved by hanging it on a makeshift drying rack or a tree branch, at least 3 feet off the ground to prevent moisture accumulation. If you don’t have a drying rack, use a stick or a branch to create a makeshift one. Allow the bivy to air dry for at least 6 hours or overnight, turning it occasionally to ensure even evaporation.
Sealing the Bivvy
Once the bivy is dry, seal the edges with duct tape or another waterproof tape. Apply at least 2 inches of tape around each seam to ensure a watertight seal. Make sure to press the tape firmly to prevent air bubbles from forming, which can compromise the bivy’s waterproof properties.
Warming the Bivvy
To restore the bivvy’s waterproof properties, warm it up using a fire or a portable stove. Hold the bivvy over the flame or heat source, keeping it at a safe distance to avoid melting the Mylar. This will help restore the bivvy’s elasticity and waterproof coating. Allow the bivvy to cool down before using it to prevent burns or discomfort.
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