Therm-a-Rest Hyperion 20F / -6C is a high performance, light and super warm sleeping bag that allows you to sleep well even in cold and wet conditions! The outside of the sleeping bag is in fact made of 10D Nylon RipStop with a DWR treatment that makes it water-repellent. The padding, on the other hand, is in 900 Fill Goose Nikwax Hydrophobic Down RDS down, which in addition to having exceptional thermal performance is also ultra-light and remains dry 60 times longer than untreated down in conditions of high humidity. Other strengths derive from its design that aims to maximize comfort, warmth and lightness by placing the padding where you need it most (70% on the top and sides with 30% on the back) eliminating cold spots in the key areas. In addition, its shape is ergonomic and the very long hinge offers you a truly exceptional ease of access and thermoregulation! There is also the system to keep the mattress firmly in the sleeping bag, a very comfortable solution especially with bags with padding in differentiated areas. Dimensions: - Regular, 203 cm x 72 cm, 580 g- Long, 216cm x 74cm, 620g- Small, 185 cm x 70 cm, 330 g Therm-a-Rest Hyperion 20F / -6C sleeping bag