This underquilt is constructed with a durable 210T Terylene shell and a 300T polyester pongee lining, filled with 700g of polyester cotton. This combination provides exceptional softness, warmth, and a lightweight feel, ensuring high functionality for outdoor use. Measuring 9.2 feet long and 4 feet wide, it offers ample coverage, designed to snugly fit around standard hammocks for effective heat retention. It integrates the insulation properties of a sleeping bag, creating a comprehensive winter hammock sleeping system ideal for solo camping adventures. The underquilt weighs just 2 pounds (890g) and packs down into a small size using the included compression stuff sack, making it convenient for carrying and storage during activities like camping, backpacking, hiking, and mountaineering. It is suitable for temperatures ranging from 41°F to 68°F (5°C to 20°C).