I’ve used many bivy sacks over the years and the absolute best one I’ve ever owned was made from Gortex. Unfortunately it was inadvertently discarded by accident and I really didn’t want to spend that kind of money again. I saw this bivy sack on Mcguire’s website advertised as genuine military surplus made out of Gortex slightly used. Whenever I see slightly used, I hesitate; however, I decided to give it a shot for $49. I cannot express enough how pleased I am with this bivy sack. I cannot tell that it is used, looks brand new! If you’re on the fence about this product, go ahead and purchase while you can. It is genuine military surplus, genuine Gortex and for all intents and purposes brand new. A Gortex bivy of this quality would cost upwards of $250-$300 if you can find one. This will go down in my history as one of the best deals I’ve ever tripped over. If this is what you’re looking for and you truly want to stay completely 100% dry while protecting your down bag, jump on this and you’ll never look back! Great company.