Product InformationWhen you need to extend the range of your sleeping bag system, play it safe and carry our 14 ounce EverLite. This mummy-cut, box stitched, sewn-thru is made for efficiency and versatility. There is no no foot box and it features a very lightweight and compact (yet full length) YKK size #3 coil zipper. This design allows the bag to be opened up completely to use like a tapered blanket for car camping or threaded over a hammock and zipped up to provide insulation all around your body. Both the top and bottom sections are open and feature and adjustable draw closure. This bag can also be used as an overbag with another two or three season mummy to create a system for camping in colder weather. Testing has shown that the EverLite can add about 10? F of additional warmth when used properly as an overbag. Everlite Sleeping Bag - 6'6