Why are some fabrics warm to the touch and others cool to the touch?

Why are some fabrics warm to the touch and others cool to the touch?
From the perspective of clothing thermal and humidity comfort,
It's the fabric's "warm and cold touch" that's causing the trouble.
What is the contact feeling of warmth and coolness of fabrics?
When the skin is in contact with a fabric with a different temperature, heat exchange will occur between the skin and the fabric, resulting in a certain difference in temperature between the skin at the contact point and the skin at other parts. This difference is transmitted to the brain through the nerves, causing people to have a feeling of coldness. Or the judgment of contact warmth.
To put it simply and crudely: the temperature difference between the skin and the fabric leads to a sense of warmth and coldness in contact.
What kind of fabric feels warmer when touched? What kind of fabric feels colder when touched?
Generally speaking, the reason that affects the warm and cold feeling of the fabric is mainly the surface state of the fabric. The smoother the surface of the fabric, the stronger its cold feeling. Therefore, some finishing methods of sanding and fleece can greatly improve the surface condition of the fabric. Contact warmth. Handsome weave is warmer than satin fabric, and terry weave is warmer than plain stitch (jersey) fabric.
The satin fabric, which is known for its smooth and smooth surface, has a stronger sense of coldness than wool tissue.
In addition, the thermal conductivity and specific heat value of the fiber also have a certain impact on the feeling of warmth and coldness. In layman's terms, the thermal conductivity represents the ability of a substance to transfer heat. The larger the thermal conductivity, the better the ability to conduct heat. Generally speaking, under other conditions being the same, the greater the thermal conductivity of the fabric, the stronger the cold feeling of contact.