UNIQLO S-size T-shirt made with Airism material. Since it's a men's S size, it's probably equivalent to a women's M size. I've worn it several times, but there are no stains. It's not see-through, so it's good to wear in the summer, and since it's Airism, it's comfortable as an inner layer in the winter without getting too hot. Please understand that this is a used item. - Brand: UNIQLO - Model: U - Size: S (Men's size) - Material: 53% polyester, 30% cotton, 7% polyurethane (using recycled polyester) - Features: Airism Thank you for looking.