1. Fashion, super waterproof and tear-resistant fabric, large capacity/tear-resistant/splash-resistant; This mountaineering bag is made of waterproof and tear-resistant nylon fabric, which has superior wear resistance, waterproof, rainproof and snow-proof, is suitable for all kinds of harsh environments, and has no worries, so it is the first choice in travel bags. 2. Ergonomic backpack system design, lightweight backpack is more labor-saving and breathable. According to the design of human back movement structure, it fits human muscles and scientifically distributes the weight of the backpack evenly throughout the back, effectively alleviating the problems of muscle soreness caused by long shoulder. 3. The selected materials are exclusively customized for the exclusive anti-oxidation zipper, and the sound made when it is buckled is crisp and loud, with outstanding elasticity. It can be used normally at MINUS 50 degrees, and can quickly recover its shape after extreme distortion. The design of life-saving whistle with buckle on the chest helps to fix the position of the backpack and reduce the burden on the shoulder and back. It is also a life-saving whistle to protect your safety at any time. 4. The interior of the main warehouse can be used separately, and a 14-inch notebook computer can be installed in the compartment. It is easier to find things with you. The auxiliary bin is in front of the main bin, and the zipper is located on the side of the backpack.The layers are clear, which is more convenient to take. The side mesh bag has good elasticity and is not easy to deform and pilling after long-term use. Kettle can be placed. Articles such as umbrellas. 5. The breathable mesh shoulder strap is equipped with a large number of sponge pads, which helps to relieve shoulder pressure. Widened and thickened S-shaped shoulder strap and high elastic breathable back support realize the best ventilation and reduce the burden.