The Snugpak Silk Liner is a practical option for both hot and cold weather conditions. Silk fabric is a poor heat conductor, so it will trap and retain heat when it and the sleeping bag are closed to ensure you stay warm. To use the liner in warm climates, sleep with the liner open to help keep heat out and release heat from your body. This will also allow a breeze to pass through to keep you cool and comfortable. These characteristics make the Silk Liner one of Snugpak’s most efficient sleeping bag liners as it can be used in extremes of heat and cold. The Silk Liner’s dimensions are 87 inches long by 31 inches wide to offer you plenty of room while you sleep. This lightweight liner weighs only 5 ounces and packs down to a travel-friendly 6 by 3 inch size in the included stuff sack. The Silk Liner is a versatile sleeping bag liner that provides heat management in warm and cold climates in a package that fits easily into space restricted luggage or backpacks.