Class C clothes are products that cannot directly contact the skin. If it's a coat, you can wear it. But if it is underwear and other close-fitting clothes, you can't wear it.

The grade C on clothes represents the safety classification of clothes. Among them, Class C clothes mainly refer to clothes that can't directly touch the skin, and Class C clothes also contain the most toxic substances, so try to avoid direct contact with the skin.

Extended data

Generally, Class A is baby clothes, and its methanol content shall not exceed 20mg/kg. Class B is clothes that come into direct contact with the skin, and its methanol content shall not exceed 75mg/kg. Class C is clothes that are not in direct contact with skin, and the methanol content shall not exceed 300mg/kg.

Clothing sold through formal channels will be marked with safety categories on the tag. Consumers should pay attention to distinguish the safety categories of clothes when purchasing clothes, and avoid wearing clothes marked as Class C that are not in direct contact with the skin.

Baidu Encyclopedia: Clothes (Clothing Label)