Finally, King/Cal King Waterbed Sateen Stripe superior weave, woven in the best authentic way is done using the best cotton in the world. Egyptian cotton, it"s not just cotton grown in Egypt - it is a particular type of long-staple cotton originally grown along the Nile. Egyptian cotton has the longest fibers. That is, when you pull the cotton from the cotton plant and remove the seeds and waxes, Egyptian cotton has longer fibers available for spinning into yarn than other cottons. When intertwining strands of yarn to make a larger product, long-staple cotton has fewer connection points, and therefore a greater percentage of area is the natural softness of the cotton. * 100% Egyptian cotton * 300 Thread count * 4" Hemming with Piping, Flats & Pillow cases* Fitted & Flat sheets are attached at the footer so bed stays made.