This heavyweight cotton t-shirt is a durable staple product with a classic fit, it is perfect for sweating your way up Mt Eden. Seamless double-needle collar Double-needle sleeve and bottom hems Taped neck and shoulders for durability Fabrication: Solid Colors are made from 100% cotton (preshrunk jersey knit); Ash Grey is 99% Airlume combed and ring-spun cotton, 1% polyester; Sport Grey is 90% cotton, 10% polyester; Heather Colors are 50% cotton, 50% polyester.