The bivvy bag serves as an external protector for the sleeping bag during planned and emergency overnight stays in nature. Protects against moisture, rain and dirt, and increases thermal comfort. It has taped seams. Long zippers on both sides are covered by a flap and allow for comfortable use. The bag is big enough for all types of sleeping bags and you can also put a sleeping pad and some personal belongings in it. Inner document pocket. Mosquito netting in the head area.