Smoother than Other Cotton Sheets from Same Thread Count: Our 500 thread count sheets set is made from extra long-staple cotton with a longer fiber length that produces stronger and smoother surface. The fabric is then mercerized for extra sheen and silky texture, and to improve the depth of the color so the sheets don t fade or pill on the wash. This makes our 500 thread count sheets smoother and more durable than other bedsheets in the market. Cloudweight & Soft + Light on Pocket: These xl twin sheets cotton are light and cool as air & breathable in hot summers. The sateen finish lends a silky feel of the hotel bed room. Our xl sheets cotton set includes 3 pieces: 1 flat or top sheet (66 w x 96 l), 1 fitted or bottom sheet (39 w x 80 l + 16 deep pockets), and 1 standard pillow case (21 w x 32 l)