Mountaineering clothes are made of fabric with smooth surface and sand prevention; It is generally better to choose three layers of material for jackets; The down jacket is filled with down stuffing, which is huge and round. So what is the specific difference between the three? Down coat. Because of its strong thermal insulation, it is mostly worn by people in cold areas and is also commonly used by polar investigators. Down jacket is big and round, which is not suitable for showing female lines. Instead, bright colors are used to reflect the beauty. The appearance of ultra-thin down jacket will bring new aesthetic feeling to urban women. Down jackets generally account for more than half of duck down, and can also be mixed with some tiny feathers. Wash duck down, sterilize it at high temperature, and then fill it in clothes, which is the down jacket. Down jacket has good warmth retention. Mountaineering clothes are made of waterproof materials special for feathers, which can effectively prevent duvets from getting wet. It is filled with 700 fluffy goose down, which can cope with the cold of MINUS 25 degrees. Enough to meet the most professional mountaineering needs. In terms of performance, the materials of suits can be basically divided into two categories: one is EPTFE composite membrane microporous fabric, and there are only three kinds in China at present: GORE-TEX, DENTIK and EVENT. Its waterproof and breathable function is to compound a layer of microporous membrane on the outer fabric of clothing, in which micropores are smaller than water droplets and larger than gas molecules, which can block rain and volatilize their own sweat; The other is hydrophilic fabric coated with PU or TPU (or composite film). In addition to the above three, other brands are in this category. Its function is realized by non-porous waterproof layer and hydrophilic molecular chain structure. Compared with these two kinds of materials, the advantages of expanded PTFE fabric are waterproof and breathable, especially its stability at low temperature (which is also the reason why snow mountain climbers wear this kind of clothing), and its application range is relatively wide. Disadvantages are slightly poor washability and high price; PU fabric has the advantages of good durability and low price. The disadvantage is that the air permeability is poor, especially when the ambient temperature is low, because of the instability of the material performance, the air permeability will be reduced, and the application scope is not as wide as the former.