MyBob's Cotton Blend Sheet Set is like no other! This 600 thread count set is specially woven with cotton threads on one side and polyester threads on the opposite side giving these sheets the perfect blend of a silky sateen weave. While the top sheet design allows your skin to be exposed to a soft cotton side, the polyester layer on the service will allow for wrinkle resistant. The full-length elastic and deep pocket design fit mattresses up to 18 inches thick, making this sheet set versatile across a wide variety of mattresses.