Preserve yourself for eternity or at least the next day in the mummy style Wind Lip 28 Degree Synthetic Sleeping Bag from Big Agnes, which packs a warm punch in a lightweight bag designed for speedy three season backpacking and camping. Boasting vertical, high loft Insotect Tubic baffles stuffed full of Bluesign approved Pinneco Core insulation, the Wind Lip is breathable as well as warm, making it a versatile option in everything but icy winter temps. The Core Screen technology sheds external water while drawing perspiration out of the bag, keeping you dry even if you get a little too warm. Unlike most Big Agnes bags, the Wind Lip uses traditional 360 degree insulation, without the pad sleeve or required pad needed to insulated you from the ground. When the night's hovering around freezing, the no draft collar and zipper keep the cold air at bay, and the contoured hood seals around your head to create a warm mini climate that Otzi the Iceman would've loved. If you'd prefer to spend the night snuggling up with a friend, you can mate left and right zippered bags to create a doublewide bag with more than enough room for two person shenanigans.