Duet, 400-thread-count sateen sheeting and duvet collection enhanced with a handsome damask stripe design. Made of 100% Egyptian cotton. The Finest in luxury linen sheeting, woven to create a silky smooth surface with a luminous sheen and is known for its luster and drape. Duet sheets are a little thicker and more tightly woven and have a soft, inviting touch that are perfect to snuggle into bed with during the cold winter months. Portugal. 100% Egyptian Cotton. Machine washable..