Woven with 100% Egyptian long-fiber cotton, the 400-thread-count sheets offer superior quality, durability, and smooth feel that gets softer with each wash. The luxurious sateen weave feels soft, silky and smooth.A single-ply, sateen weave with a high thread count means your sheets feel soft and silky, while resisting piling. With a pocket depth of 15", you can stretch up to 18" to fit your mattress. Please follow the care instructions on the label to minimize wrinkling and/or shrinkage. Remove bedding from the dryer promptly, press with a warm iron if necessary.