Marmot Never Summer 0F Degree Mummy Sleeping Bag - Solar/Red Sun - Plunging temps don't stop when you're on the trail or car camping-that's why the Men's Never Summer Sleeping Bag is a must-have for staying warm and dry. It packs tightly into a backpack for long treks, and 650-fill-power down helps prevent heat loss on cold winter nights. Looking for more room? Open the footbox for space to stretch or zip it up for extra warmth. Unzip the extended zipper flaps on extra-cold nights for blanket-like coverage. Certified 650-fill-power down with Down Defender to improve water resistance in wet conditions Dual-side zippers for easy access; extended zipper flaps provide extra blanket-like coverage when unzipped Footbox zipper opens for extra space and closes for extra warmth and comfort Recycled shell and lining fabrics Cinchable draft collar prevents heat loss Internal stash pocket ISO-tested for temperature rating