Our PFC-free synthetic fiber sleeping bag is the solution for trekkers seeking comfort and an optimal warmth-to-weight ratio. Elastic chamber seams keep the synthetic sleeping bag close to the body. It can stretch up to 25% in width, providing plenty of freedom of movement while quickly warming up, as the sleeper has to heat less air. The new contoured functional hood reliably envelops the head, and the raised, diagonally cut foot area fits perfectly. New materials ensure a pleasant and quiet sleeping environment.