Down trousers are the best natural materials to keep warm. After washing, drying and grading, down trousers are made. Generally speaking, down trousers are light, soft and warm. Because down is soft, it is used as a filler for clothes and even pants, and it is very comfortable to wear. In fact, down is not prone to fiberboard knots. High-density coated fabrics are mostly used in fabrics, which can keep more air in clothes and thus have good warm-keeping performance.
Wool pants are autumn and winter pants made of wool, wool pants = warm pants _ slim pants, keep warm and not bloated, look good and wear well! Wool trousers with the same weight are warmer than cotton trousers, but slightly inferior to down trousers.
To sum up, the warm-keeping effect of down trousers is relatively better.