Upgrade your sleeping bag with this extra warm down filled foot muff. Cosy Feet is a unique down product that works as a foot muff on cold nights and doubles as a light and soft travel pillow. Extremely useful in sudden cold situations as it increases the insulation of any sleeping bag’s foot box and rapidly expands the bag’s range of use. Cosy Feet has a small pack size and can even serve as an extra storage bag for a down sleeping bag.