The XCSS – Extreme Cold Sleep System was designed to provide outstanding functionality and thermal insulation in extreme environments. The LinZip technology of the ergonomically positioned, diagonally angled zipper allows fast closing and opening of the bag with little effort in an emergency. An innov-ative cord management system allows the hood and draft collar to be tightened from inside the bag, preventing heat loss. Made of durable materials, the XCSS weighs only 1.6 kg.