Performance bedding and luxury meet. These 400-thread count sateen woven sheets are crafted of 100% Tencel modal with long-lasting silky softness, enhanced breathability, and brilliant color retention, and are made from a fiber that is sustainably sourced. Tencel modal is made from a blend of hardwoods including beech trees, all of which are a natural and renewable raw material sustainably sourced from Austria and other neighboring countries.