The Couloir is a 3 season, down bag which has been body mapped to optimise weight and warmth. The centre front zip makes for easy access and venting, with zero cold spots thanks to the double-sided zip baffle. It is filled with R.D.S. approved duck down with a 700 fill power and this is protected by the lightweight, down proof shell. Other features include: the adjustable internal collar, the adjustable hood and the ergonomically shaped design.