Snugpak softie elite 3 sleeping bag with the Snugpak expanding panel system, thermal barriers, adjustable length system and shaped designed foot system. Expanding zip system gives you the ability to use the bag in different conditions from clammy nights to icy nights. The expansion systems also allows you to control both temperature and size of the sleeping bag, open up for maximum movement or zipped up tight to trap that precious warm air for a a great nights sleep.Super price for this quality sleeping bag. The snugpak softie elite 3 is a super bag and great price. Great mid range sleeping bag.