Stylish underwear vest, worn over undergarments. Although listed as men's, it can be worn by both men and women. Size L, but it's small. Fits like a size M. Please check the 5th image. Color: Shadow Gray Acrylic: 83% Rayon: 15% Nylon: 2% A vest to be worn over underwear, under clothing. What used to be called a waistcoat. Very warm and useful. I've worn it several times, and it's fine to wash in the washing machine without washing it separately, as indicated on the label. No pilling. Please confirm the size as it is smaller than the listed size before purchasing.