Hand printed by the original artist, not machines and fully sweatshop free. Solid colors black, army, asphalt and solid navy are 100% cotton, heather colors are cotton polyester blend. Superior quality American Apparel or Bella Canvas shirts, there is no higher quality shirt available. Always fast and free shipping with tracking Hand printed with eco friendly, permanent ink in the USA Free returns and exchanges Our men's tees are the super soft and built to last. We use eco friendly yet permanent water based inks and print in house In Oakland California. Designed and printed in the US, never overseas. Most orders ship same or next business day. Sizing Guide: Bella and American Apparel men's shirts run true to size Small- 34-37 inches around the chest Medium- 38-41 inches around the chest Large- 42-45 inches around the chest Extra Large- 46-49 inches around the chest Extra Extra Large- 50-53 inches around the chest