This sleeping bag is made from water-resistant polyester shell, soft polyester pongee lining and down cotton filler to keep you warm in outdoor environment. Connected to your power bank, this sleeping bag will be heated quickly and distribute the heat for enhanced warmth. The adjustable temperature modes can meet different demands. This sleeping bag is really a great choice for those who love camping, hiking, backpacking in this winter. Features: Material: 210T polyester shell fabric for water repellence and tear resistance. Polyester pongee lining and soft down cotton filler provide optimal warmth and comfort. Heated: Quickly get heated by a power bank in seconds, and distribute the heat via the four heating panels to keep you warm. (Power bank is not included) Adjustable Settings: Red light for high temperature mode, Blue light for medium temperature mode, Green light for low temperature mode. Three settings meet different needs. Breathable: The bottom of the sleeping bag can be unzipped to increase breathability and allow you to move freely. Portable: Comes with a sack for convenient storage and transportation, suitable for camping, hiking, traveling, and other outdoor activities. Specifications: Material: Rip-stop polyester Lining: Polyester pongee Filler: Down cotton Color: Blue / Orange (optional) Comfortable Temperature: -15 ~ 20 Size: (180 + 30) * 75cm / (70.9 + 11.8) * 29.5in Storage Size: 26 * 42cm / 10.2 * 16.5in Weight: 1.8kg / 4lb Package List: 1 * Sleeping Bag 1 * Storage Sack