The 525 Thread Count Sheet Set is made of 100% soft long staple cotton. The flat sheet and pillow cases have bordered hem with coordinating color to enhance the expansive bedroom look and feel. The finish weave is made of single ply yarn to give you a smooth, silk, luxurious finish. The sheets are over-sized to ensure your comfort – the fitted sheet will fit up to a 20” mattress and will always stay in place with fully elastic around the whole sheet. We offer many sizes and colors to coordinate with any décor you may have.