What is the design of "air-conditioned" clothing that is warm in winter and cool in summer?

Air-conditioned clothes are also called fan clothes. The fabric of the air-conditioned clothes is similar to the fabric of sun protection clothes, and there are two detachable small fans on the waist. The power bank and the small fan are connected through USB, and then the power bank drives the small fan. , to achieve the purpose of preventing heatstroke and cooling. However, this kind of air-conditioned clothing cannot heat, so it cannot achieve the "warmth in winter" effect.

What can achieve the effect of winter warmth is heating clothing. The heating clothing has carbon fiber or graphene heating sheets placed in the middle of the clothes, and is also powered by a power bank. Currently, heating suits made of these two materials are available on the market. There are no obvious advantages or disadvantages. However, graphene heating sheets are more expensive than carbon fiber heating sheets.

Currently there is no clothing that can simultaneously keep you warm in winter and cool in summer