100% cotton. By buying cotton products from J.Crew Factory, you're supporting our investment in Better Cotton's mission to help cotton communities survive and thrive while protecting and restoring the environment; this product is sourced through a system of mass balance and therefore may not contain Better Cotton. Rib trim at neck. Machine wash, tumble dry low. Imported. Item 40993 size men's medium pit to pit 21" length 28" please view last photo carefully. There is a sun fade line on front. cy-16