Goretex bivy bag keeps you nice and dry for those wet days camping when you end up sleeping in a puddle. Sleeping bag fits inside; Designed to protect the CF issue Down fill sleeping bag so it will also work with a standard sleeping bag, or ranger blanket Lots of folks use it as a ground sheet/ tent / light weight wind proof waterproof breathable sleeping bag on its own. 96 x 34. Taped seams, drawstring mummy-bag closure.