The system keeps you warm down to 50ºF. Inner Black Mil Spec -ripstop nylon patrol bag (83"L x 37"W) can be used alone in temperatures down to 30ºF.Genuine U.S. Issue outer O.D. bag (85"L x 35"W) is designed to be used in temperatures from 30ºF down to -10ºF. The two bags combined together you get a system capable of -50ºF (in conjunction with cold weather clothing). A Woodland Camo Gore-tex® bivy cover (85"L x 35"W) is included for added protection from wind, rain or wet snow. Entire system compacts to half its size in the included black nylon compression stuff sack. Machine washable and dryable. Fitted with a Delrin molded non-freezing zipper with double pull non-locking sliders for rapid emergency exit. Used Excellent. Our supply is limited, so don’t delay.