Please be clear first, lamb wool is different from cashmere. It is an ambiguous synonym commonly used by merchants. In essence, the material is no different from polar wool.

Relatively speaking, polar fleece is more easily contaminated with dust. Due to the production method, the thickness of cashmere quilt is usually not too thin, which will give people a warm feeling, but in fact, the difference in warmth retention effect is not great, but the thickness is very different.

Therefore, if you are not afraid of the dust pollution of polar fleece and don't want your pants to be too tight, then choose polar fleece.

If we pay more attention to the warm-keeping effect, lambswool is better, because as underwear, the increase of thickness can directly increase the warm-keeping effect.

You can ask additional questions if you have any questions, and Xiao Nan will try to answer you:)