Sonder -10°C SUPERSEDEDThe Sonder sleeping bag is a streamlined, practical bag with versatile features, a spacious cut and a lighter build, designed for comfort and warmth year round. Its available in three temperature ratings: 5 M (+1 F) C or 8 M ( 1 F) C or 10 M ( 3 F) C ISO 23537 1 limit of comfort rating, and small, regular and large sizes and filled with 800 850 loft Non PFC Hydrophobic Down. The tapered rectangular shape gives space to move, while the Vertical V