The Sea To Summit Spark -9°C/15°F sleeping bag is designed to offer unrivalled performance in the coldest conditions. Thanks to its down fill, this model ensures optimal thermal insulation while remaining lightweight and packable. Ideal for adventurers braving extreme temperatures, it features a mummy shape that hugs the body to minimise air spaces, thereby accelerating warming and reducing overall weight. This sleeping bag benefits from an Ultra Dry Down 850 treatment, which enhances its water resistance, thus providing effective protection against moisture while maintaining its insulating properties even in wet conditions. The 10D Nylon lining contributes to the lightness of the bag while offering a soft touch feel. Specifications of the Sea To Summit Spark -9°C/15°F Sleeping Bag: Fill type: downWater-resistant Ultra Dry Down 850 treatmentLining: 10D NylonShape: mummyHalf-length zipper with zipper guardComfort Temperature: -2°C / Limit Temperature: -9°C / Extreme Temperature: -26°C Sleeping bag Sea To Summit ---Spark -9°C/15°F Grey Yellow