Hmm those emergency bivvy bags are really designed for one use only and wont stand much abuse plius they will leave you soaking wet by morning from condensation. Whereas the pertex bags whilst breathable aren't waterproof. I'm thinking goretex bivvy for durability.
Hmm those emergency bivvy bags are really designed for one use only and wont stand much abuse plius they will leave you soaking wet by morning from condensation. Whereas the pertex bags whilst breathable aren't waterproof. I'm thinking goretex bivvy for durability.