The t-shirts are made from 100% Airlume combed and ringspun cotton, so they’re soft and comfortable to wear. The solid colors are 100% cotton; the heather colors are 50% cotton, 50% polyester (Sport Grey is 90% cotton, 10% polyester); and the antique colors are 60% cotton, 40% polyester. The fabric is pre-shrunk, so it’ll hold up well over time. The shirts also feature a tearaway label for easy removal.