The Sea To Summit Spark -1°C/30°F sleeping bag is ideal for adventurers seeking light weight and thermal performance. Its mummy shape hugs the body for optimal heat retention, while still providing ample space for a restorative night's sleep. The down fill ensures an excellent warmth-to-weight ratio, while the Ultra Dry Down water-resistant treatment protects against moisture, thus preserving insulation even in damp conditions. Designed with a 10D Nylon lining, this sleeping bag blends durability with a soft touch, ensuring unmatched comfort. The half-length zipper is equipped with a zipper guard to prevent snags and heat loss. With a comfort temperature of 4°C and a limit temperature of -1°C, the Spark -1°C/30°F is perfect for spending the night outdoor in cold conditions. Specifications of the Sea To Summit Spark -1°C/30°F: Fill type: DownUltra Dry Down water-resistant treatmentLining: 10D NylonShape: MummyHalf-length zipper with zipper guardComfort Temperature: 4°C / Limit Temperature: -1°C / Extreme Temperature: -18°C. Sleeping bag Sea To Summit ---Spark -1°C/30°F Grey Yellow