It is also important to testing the waterproof performance and tensile standards, the backpack test tension is guaranteed for outdoor camping hiking , In addition, the waterproof performance will to reach of IPX8, the need to backpack into the dry paper towels, into the water depth of 1.5 meters, the test duration of 30 minutes, after the test the specimen exhibited no ingress of water . after them the inspection report will make a pass .