This is a brand new set of underwear. ^_^ The long-sleeved shirts are 100% cotton on the skin side, but the outside is polyester, so they should dry easily. There are three different thicknesses, including a quilted material. The leggings are 100% cotton and have a slightly brushed back for moisture absorption and heat generation. They are thick, so I will take them out of the bag and repack them before shipping. Thank you for your understanding.