Is Flannel Warmer Than Cotton?

Flannel is warmer.
1. Thermal insulation effect of pure cotton materials
Pure cotton, a natural fiber material, is breathable and hygroscopic. It is also comfortable and soft. It is one of the fabrics that many people like. However, pure cotton material itself is not warm, but is widely used in underwear, T-shirts, shirts and other clothing. In the cold season, if you simply use pure cotton clothing, the thermal insulation effect is not very good. After all, it is not a thermal insulation material itself.
2. Thermal insulation effect of flannel material
Flannel is a kind of warm fabric, because it is processed by brushing, sanding and other techniques, so that its surface presents fine fluff, which can weaken the heat convection between clothing and air to a certain extent, increasing the Improves the thermal insulation of clothing. In addition, flannel feels soft and comfortable, is more suitable for wearing on the skin, and can play a good role in keeping warm.
Because the material of flannel itself is a kind of polyester fiber, it can retain heat well and has good thermal insulation properties. Cotton, on the other hand, has poor warmth retention and is easy to dissipate heat. Even thickened quilts are difficult to compare with flannel.