Easy To Use Make Bed: bed sheet holder saves your effort each time you make bed, stops lifting mattress to avoid hurting your back or breaking . Simple & sleek wrapping design stops you dragging your sheets back and forth, keeps your sheet tucked in. Sheet Holders Keep Sheets & Tight: bed sheet holder saves your time and effort when everyday make a bed. Also re-use your loose fitted sheet, keep retain your sheet stay in place all night for better sleep Material & Type: bed sheet straps king size bed made of machine washable cotton, polyester, and . Recommended thickness of the mattress should , Perfect for standard king size matress . Right Amount of Tension: The elastic rubber for sheets is engineered with patented embossed ribbing that uses a horizontal tension design to bedding. The sheets tighteners band are designed to accommodate mattress sizes ranging from Twin/Full to King, and can even work with adjustable beds. Perfect for Any Fitted & Flat Bed Sheets: Transform any sheets into a fitted sheet bed in seconds. bed sheet fasteners is great for flat sheets and fitted sheets, also loose bed sheets, top sheet, topper or blankets. Just the sheet into sheet holder and enjoy the perfectly made bed color:Black Material:polyester Package Contents: 1 x Bed Sheet Holder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.