People prefer shortening the name to a bivy sack. It has tough waterproof nylon that is durable on its bottom-most layers. To allow you to breathe well when sleeping inside, it has a lightweight top.
People prefer shortening the name to a bivy sack. It has tough waterproof nylon that is durable on its bottom-most layers. To allow you to breathe well when sleeping inside, it has a lightweight top.