The Trailhead ThIII is a sleeping bag designed by Sea To Summit, perfect for weekend adventurers. This sleeping bag is both versatile and high-performing: the WaveLoft™ construction of the Trailhead ThIII uses thick layers of insulation wrapped together to increase insulation and trap warm air pockets. As a result, you'll stay warm even in cold weather. This Sea To Summit sleeping bag also features thicker insulation at the feet, reducing the risk of cold feet disrupting your sleep. The rectangular shape offers more space than a mummy-shaped sleeping bag. The full-length right-side zipper allows the Trailhead ThIII to be opened and used as a quilt. Finally, a second zipper at the bottom of the sleeping bag provides additional ventilation for excellent temperature management. Tapered rectangular shape for more space and comfort than a traditional mummy bag Full-length zipper allows the bag to open flat and be used as a quilt A second zipper in the footbox allows for additional ventilation WaveLoft™ construction for more warmth and loft Lining fabrics attached to the shell prevent tangles 30D DWR nylon shell and 20D nylon lining are lightweight and highly compressible fabrics Includes a storage bag for compact storage Outer material: 100% nylon Lining: 100% nylon Primary filling material: 100% polyester Storage bag: 100% nylon, excluding trims Comfort temperature: -1°C Limit comfort temperature: -7°C Extreme temperature: -24°C Trailhead ThIII - Regular: Maximum user height: 183 cm Packed dimensions: 21 x 40 cm Compression sack volume: 10.2 L Weight: 1,370 g Internal chest circumference: 152 cm Internal hip circumference: 146 cm Internal foot circumference: 102 cm Trailhead ThIII - Long: Maximum user height: 198 cm Packed dimensions: 24 x 45 cm Compression sack volume: 12.1 L Weight: 1,530 g Internal chest circumference: 162 cm Internal hip circumference: 157 cm Internal foot circumference: 108 cm Sea To Summit Trailhead ThIII - Sleeping bag