A tapered design to fit inside the mummy-style sleeping bags. It will add about 10 degrees of warmth to an existing bag or you can use this by itself on warmer nights. Made from Polartec 200 fleece, this liner is compact and lightweight enough to travel anywhere. The hood also doubles as a pillow because you can stuff the Hood Pouch with extra clothes and close with velcro fasteners. A 3/4 length zipper allows for great ventilation and the hood drawstring can help trap your body's heat. A convenient mesh storage bag is included. Sizes: Regular 30" x 82", Long 30" x 88". Weights: Regular 2 lbs., Long 2.4 lbs.