Main Features1.Zip two together for double the room.(Joint left-zip and right-zip sleeping bag together through zipper).2.Roll Control Design makes folding quick and easy.3.Half-moon hood with the adjustable drawstring can retain head and you warmer.4 season sleeping bagOur sleeping bags are designed for most seasons. With comfort temperature of 32-77 degree Fahrenheit, which keeps the average sleeper warm.Material290T Nylon,Waterproof and Breathable Fabrics;Lining Material:Polyester Pongee;Fill-Material: Polyester Fibre.Backpacking SackOur sleeping bag comes with a travel-friendly carry bag with straps, making it quite convenient keep to store and carry.