The Trailhead ThII is a sleeping bag designed by Sea To Summit for weekend adventurers. This sleeping bag is both versatile and high-performing. The WaveLoft™ construction of the Trailhead ThII uses thick layers of insulation wrapped together to increase loft and trap warm air pockets. As a result, you will 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, which can be an unpleasant sensation that disrupts your sleep. The rectangular shape offers more space than a mummy-shaped sleeping bag. The full-length right-side zipper allows the Trailhead ThII to be opened and used as a quilt. Finally, a second zipper at the bottom of the sleeping bag provides additional ventilation for your feet, allowing for excellent temperature regulation. Tapered rectangular shape for more space and comfort than a traditional mummy bag Full-length #5 YKK zipper allows the bag to open flat and be used as a quilt Second slider in the footbox for versatile ventilation WaveLoft™ construction for increased warmth and loft Lining fabrics attached to the shell prevent tangles Oversized anti-snag zipper draft tubes 30D DWR nylon shell and 20D nylon lining are lightweight and highly compressible fabrics Includes a stuff sack for compact storage Outer material: 100% nylon Lining: 100% nylon Main filling material: 100% polyester Stuff sack: 100% nylon, excluding trims Trailhead ThII: Regular Maximum user height: 183 cm Compression sack volume: 7.1 L Weight: 1040 g Internal chest circumference: 152 cm Internal hip circumference: 146 cm Internal foot circumference: 103 cm Trailhead ThII: Long Maximum user height: 198 cm Weight: 1200 g Internal chest circumference: 162 cm Internal hip circumference: 157 cm Internal foot circumference: 108 cm Sea To Summit Trailhead ThII - Sleeping bag