"Ideal for hammock camping in winter conditions, the Eagles Nest Outfitters Ember UnderQuilt Ember UnderQuilt adds a thick and dependable layer of warmth to your hammock and sleeping bag. This reasonably priced, universal-fitting, polyester-filled underquilt surrounds the sides and bottom of your hammock, blocking out the chill and sealing in the warmth. The rugged shell is made of nylon-taffeta ripstop and boasts a durable water-repellent (DWR) finish that keeps you dry in light rains and damp conditions. Adjustable shock cords at each end make setup quick and easy. Packs down into an included 15""L x 8""W stuff sack. Manufacturer model #: A4024. Surrounds sides and bottom of hammock Block wind and chill; seals in warmth DWR finish Rugged construction"