★100% Giza Egyptian Superfine Cotton Waterbed Sheets★The waterbed fitted sheet is similar to the flat sheet except it has an extra triangular fabrics sewn at the four corners and both flat and fitted are sewn together by the footer so bed stays made. In addition, the fitted sheet is always made few inches larger than the water mattress so the extra fabric can cover the mattress sides when made.① Made with 100% Giza Egyptian Cotton — The longest, finest, and rarest cotton in the world. Often called White Gold, only a few thousand bales of this superfine cotton are grown each year. This is the crown jewel of cottons, ranked above all others for its extraordinary strength, unparalleled hand-feel, and luxurious luster. ② What’s Included — The Sheet Set includes 1 flat sheet, 1 fitted sheet, 2 pillowcases. Standard pillowcases fit all sizes except kings. King pillowcases are included with King, California King sets. The pocket accommodates all mattresses and fits mattresses up to 10" in depth.③ Single-Ply Yarns — For standard cottons, or even most other long staple cottons, a high thread count does not translate to a better quality sheet. Using single-ply yarns, most cottons achieve a maximum thread count of around 200-500. After that, multi-ply yarn must be used, which generally indicates a lower quality cotton that needs multiple plies woven together for strength. Giza Cotton is different. Because it is the longest and finest cotton in the world, it is woven in a single-ply to extremely high thread counts per inch. No multi-ply yarn is used.④ Sateen Weave — To make the softest sheets you will likely ever experience, our Giza Egyptian Sheet features a sateen weave. Sateen is a four over and one under weave, which maximizes the surface area and gives it its subtle sheen and silky luster.