Question

why do we feel warm after wearing woollen cloths

Answer 1

As air is a poor conductor of heat it prevents the loss of body heat. Thus we feel warm under the wool. Woolen clothes have fine pores filled with air. ... Therefore in winter, we wear woolen clothes as they check the conduction of heat from the body to the surroundings and thus keeps the body warm.

Answer 2

wool hair fibres act as an insulator to trap the air inside the cloth, which helps stabilise your body temperature. Since air conducts heat, this means the warmth you might generate through exercise or general movement also gets trapped by wool, which keeps you even warmer.