The Synthesis 20 W sleeping bag from Sierra Designs is designed with synthetic fibers to provide warmth and water resistance. The double zip opening allows easy control of ventilation, balancing warmth and coolness effortlessly. For hot summer nights, a foot vent further enhances ventilation. In winter, fear not, thanks to its neck draft collar which significantly reduces heat loss. Weighing 1161g (Regular version) and with a usage temperature of 0°C, it is an ideal companion for many adventures. Embark confidently on that long-desired trail! Whether it's the Stevenson Trail, the Jura, or the Pyrenees, this sleeping bag has got you covered! Synthetic insulation provides high warmth, even when wet Double zipper system for easy use Foot vents for quick and easy ventilation Insulated neck draft collar to minimize heat loss 20D nylon fabric Insulation: Sierra Loft Synthetic Outer fabric: 20D Nylon Ripstop Lining: 20D Nylon Taffeta Comfort temperature: -7°C Limit temperature: -13°C Comes with a storage bag (40.64 x 21.59 cm) Weight: 1.71 kg Max height: 173 cm Length: 185.42 cm Shoulder circumference: 149.86 cm Hip circumference: 147.32 cm Foot circumference: 101.6 cm Sierra Designs Synthesis 20 - Sleeping bag - Women's