Stable Triangle Design: Triple Protection To Keep Your Sheet Tiny All The Time, These Triangle Bed Mattress Straps Can Keep Your Bed And Sheets Tidy All The Time. High Quality: Made From Elastic Band Made Of Premium Nylon + Metal Clips, Clip Contains Soft Plastics, Won'T Bite Bad Sheets And Other Items, Wide Elastic Bands Provide Stable And Stronger Metal Clips.Quantity: 4Pcs Sheet Straps Bed Triangles With Duvet Clips Sturdy 3-Way Adjustable Mattress Corner Supports.Easy To Install: In Three Simple Steps: Open The Clips; Put The Bed Sheet In Clips; Press The Clip With The Leaf. Corner Wallets Are Compatible With All Sheet Sizes: From Small To Very Large. Perfect For Futons, Separate Beds, Air Mattresses, Foam Mattresses, Pillow Top Mattresses And Can Also Be Used On Tablecloths, Etc.We Will Provide You With The Best Products And The Best Service. If You Have Any Questions About The Products, Please Feel Free To Contact Us, Thank You Very Much