The TETON Sports Tracker +5F Double-Wide ultralight mummy bag is designed to keep you and your partner warm, even in freezing weather. Most mummy hoods pull into an oval shape, leaving ears exposed, but the three-piece, no-gap hood contours your face and keeps ears and head tucked in tight. Longer than most mummy bags, the Tracker +5F has a soft, breathable liner. This double-wide bag provides an extra layer of fill in the built out foot-box to offer your toes room and warmth - you wont need those wool socks. The TETON Sports Tracker +5F Double-Wide is a super light couples bag that weighs only 8.2lbs. with included heavy-duty compression sack. It unzips from either side so you dont disturb your partner when getting out. Each zipper has full length zipper baffles to stop cold air from seeping in through zipper teeth. Center anchor loop and toggle keeps the bag drawn tight between you and your companion to offer leverage for cinching down hoods and holding out unwanted cold. Has a safety Velcro tab and zippers are fully taped with an anti-snag design made from engineered acetal resin for extreme temperature and pressure, so theyre light-weight but still durable.