Jackets are the first choice for all outdoor lovers because of their all-weather functions. The general jacket is mainly reflected in the waterproof characteristics. In terms of fabric design and processing, the general jacket is "PU waterproof coating+glue pressing at seams". PU waterproof coating refers to the process of attaching this waterproof coating (PU polyurethane) to the fabric on the surface of clothes, and the thickness of the coating varies according to the needs. This waterproof coating is widely used in national defense, automobiles, buildings, furniture and even condoms. Even the lining of fire hose has PU polyurethane coating. Practice has proved that a good PU coating will not leak water. As for glue pressing, it is mainly to carry out special glue pressing treatment on the PU coating at the stitch and seam of clothes, which is easy to be damaged and seeped. Generally, professional glue press and adhesive tape are used to press glue at the joints at high temperature to seal all joints to further prevent water leakage and seepage. Its disadvantage is that clothes are airtight and windproof.

Jacket, as its name implies, is the clothes worn when rushing to the top, and it is one of the necessary equipment for outdoor sports lovers. From the perspective of modern mountaineering, the jacket should meet several conditions: First, the structure meets the requirements of mountaineering. Mountaineering is often carried out in harsh environments, including weight-bearing walking and technical climbing. The jacket structure should meet the requirements of these activities. Secondly, the materials must meet the requirements of mountaineering. Due to the special environment and needs of mountaineering, the material of jacket must meet the requirements of windproof, waterproof and ventilation.

The so-called professional waterproof means that whether you are sitting in a wet place or walking in a stormy environment, you can effectively block the invasion of rain, snow, frost and snow, so that water can not penetrate into clothes and make you feel wet and cold; The so-called ventilation means that when doing outdoor sports with a lot of exercise, the body naturally sweats and the skin exhales a lot of water. If you can't send it out of the body quickly, it will definitely lead to sweat trapped between your body and clothes, which will make you wet. On rainy days, it will make you feel wetter and colder. Especially in cold conditions such as mountains and canyons, it is very dangerous for the body to get cold and lose temperature, so good air permeability of clothing is very important.

The so-called windproof means that 100% prevents the air cooling effect. In the changeable natural environment, when the cold wind penetrates our clothes, it will blow away a layer of warm air near our skin. This layer of warm air is about one centimeter thick, with a temperature of 34 -35 degrees and a humidity of 40%-60%. Even a slight change in this warm air will make us feel cold and uncomfortable. When cold air blows into clothes, it destroys this warm air, leading to rapid heat loss and body temperature drop, and we will immediately feel a little chilly. This is the so-called air cooling effect.