Polyester lining Zipper closure 【Durable Material】- 65L, 11.4"*8.3"*33.4". This tactical backpack is made of 600D polyester. YKK Zipper. Rain Cover Included. 【Large Capacity & Quickly Access】- This hiking backpack with 2 side pockets(8"*9") that can hold water bottle or camping & survival gear. The backpack has large zipped access at front that can quickly access to the main compartment, opend as a 15.6" luggage. Four Seasons Available: This lightweight sleeping bag can be used at -5°C - 15°C, suitable for 4 seasons. Perfect for backpacking, camping, mountaineering, hiking, or even using at home. Humanized Design: Two-way zipper design is convenient for ventilation while locking in heat. The bottom is also a zipper design means that your feet can expand for ventilation. Multipurpose: After the sleeping bag is unfolded, it can be used as a quilt or a sleeping pad. You can also splice two sleeping bags up and down after they are fully developed, making it a double sleeping bag that is a perfect choice for couples or families.