4.2 oz 100% combed ringspun cotton 30 singles Ash is 99/1. Athletic Heather 90/10 All other heathers are 52% combed ringspun cotton 48% polyester. Marble colors are 91% polyester 9% combed ringspun cotton 30 singles 4 oz. Neon colors are 52% combed ringspun cotton 48% polyester 40 singles 3.6 oz. Slub is 50% polyester 37.5% combed ringspun cotton 12.5% rayon 30 singles 3.8 oz. Black Mineral Wash is 52% combed ringspun cotton 48% polyester 30 singles 4.2 oz. Sideseamed. Shoulder taping Unisex Sizing Retail fit