The TETON Sports LEEF Ultralight Mummy Sleeping Bag is designed for your comfort: It's filled with multiple layers of microfiber PolarLite insulation to keep you warm because it shapes to your body lines. Body mapping technology and a built-out foot box provide extra fill in specific areas to keep you warm so you sleep comfortably. Rated to well below freezing and has a 3-piece hood that contours your face and can cinch down tightly for added warmth. Full-length zipper draft tube keeps the warm air from escaping. Each bag comes with its own matching compression sack. Whether you are a new or expert backpacker, the LEEF 0F Ultralight Sleeping Bag is perfect for you because it is so lightweight and compresses down into its stuff sack to fit nicely in all TETON Sports internal frame and ultralight packs. The well-constructed LEEF is made from a sturdy 40D/240T 0.3cm ripstop that is water resistant and won't tear, even if punctured. The brushed polyester lining feels like soft bed sheets—the inside of this bag is incredibly comfortable! Taped, anti-snag zippers are easy to close from inside or outside of bag. Also includes a secure interior zip pocket for wallet or keys. It's exceptional quality at an affordable price.