1, cotton fabric has strong hygroscopicity: clothes made of cotton fabric usually have good hygroscopicity and can absorb sweat from the body. However, in the hot and humid dog days, the body continues to sweat, and the clothes with absorbent cotton are easy to get wet, and the drying speed is slow, so it is impossible to get wet quickly.

2, not adapted to the high temperature environment: cotton clothes are relatively heavy, and it is easy to generate heat sensation after wearing them, increasing the body surface temperature. In such hot weather as dog days, wearing heavy cotton trousers will aggravate the discomfort of the body, make people sweat more easily, and can not play a good role in dehumidification.