Pure cotton is harmless to human body in ordinary fabrics. Its sweat absorption and breathability are not irritating to the skin, so it has many benefits. It won't affect your health if you don't wear it. Mainly depends on whether you feel comfortable or not, and whether your skin is uncomfortable or not. Pure cotton is a kind of fabric that natural materials are not suitable for synthesis. People generally like to wear pure cotton. Besides, you are a vest, which should be the best. If there is, it's good to wear pure cotton ~ only pure cotton doesn't pay attention to storage and cleaning.