Why Is Flannel Warm？

The flannel is warm because the material of this fabric is wool, so it is warm. In autumn and winter, flannel and coral velvet can be said to be one of people's favorite items.
The flannel is relatively compact, so it will not lose hair easily. The coral velvet is rougher and thinner, so it is easier to lose hair.
Generally speaking, the flannel fabric is thicker and warmer than coral velvet, which is much better than coral velvet because it is more delicate.
Seen from the surface, flannel is smoother and softer in feel. Coral velvet has stronger friction because of some small particles on the outside. Even if the same pattern, coral velvet will appear more blurred, while flannel is more clear and bright, and flannel has higher requirements for technology, and the price is also more expensive.