Features: ▶Durable & Water Resistant: This sleeping bag made of 190T tear-resistant polyester and waterproof coating, filling with a cotton recess can always keep the heat inside the sleeping bag. Inner fabric made of 190T polyester pongee soft and skin-friendly polyester, suitable and breathable. ▶Various specifications available fit almost all seasons. You can use the adjustable elastic strap design when it's cold, the bottom zip-per design can help your feet free when you're hot can improve the air permeability, adjust to what you want. Summer comfort temperature above 25 °C, spring and autumn comfort temperature about 10 °C 20 °C, winter comfort temperature about 0 5 °C 10 °C.Specification:Item: envelope sleeping bagType: 4 season sleeping bagProduct size: (180+30)* 75cm Net weight: 0.7kg Color: red, blue, army green, navy blueFabric: 190T polyester fabricFilling: with hollow cottonComfort temperature:Summer type: over 25°CWoy and autumn type: about 10 °C 20 °C Winter type: about 0 5 °C 10 °COpacking includes:1 * sleeping bag1 * carrying bag