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.XS (fits waists 26-28); S (fits waists 29-31); M (fits waists 32-34); L (fits waists 35-37); XL (fits waists 38-40); XXL (fits waists 41-43).Machine wash.Import.