The Canadian military started to issue the bivy in the early 90's. It is designed to help keep the sleeping bag from getting wet from melting snow, etc. As it is an additional layer to the sleeping bag it provides another 10 degrees in the temperature rating for the sleeping bag.
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.