Is nylon hotter or cooler to wear in comparing to cotton?

Nylon retains heat. Worn during the summer it is hot, even if you are only wearing a short dress or shirt.

Cotton is the best to wear at any time. it does not absorb the heat, and allows the body to be cool even during the hottest day.

Polyester is the worse. Worn in warm weather it feels as if you are wearing a winter coat.