Our Camping sleeping bag is filled with white duck down, which is lighter and provides better insulation compared to other materials. Lightweight sleeping bag features a combination of envelope and mummy style design, which can be easily folded into the bag. The compact sleeping bag is also adjustable according to temperature. In warm weather, the bottom of the sleeping bag can be opened for ventilation, while in cold weather, the neck portion and top zipper of the sleeping bag can be tightened for better insulation.These adult sleeping bags made with high-quality 50D ripstop material, which have good wear resistance and can resist friction and abrasion. The travel sleeping bag has good water resistance, which can resist damp environments, and keep the body dry. Compact Sleeping Bag with Compression Sack: At only 2.77lbs, each camping sleeping bag comes with a storage bag and a compression sack, packed size only 13.78 x 6.7 .