We use certified Egyptian-quality cotton for our 500-thread count sheets and duvet covers. Egyptian-quality cotton is extra fine long staple fiber, which allows us to weave a super smooth sateen fabric that is softer, stronger, and more luxurious than ordinary cotton sheets and duvet covers. Our Egyptian-quality cotton 500 thread count sheets and duvet covers will give years of superior comfort and durability. This collection also has matching sheet/duvet sets that complement any bed!