Material: Elastic ironing cover fasteners is made of sturdy heavy duty elastic bungee cords and metal clips, which has good elasticity, smooth texture, not break easily , Size: Adjustable blastic ironing cover fasteners length is 17.5-26 cm/6.9-10.2 inch, stretchable length is 17.5-45 cm/6.9-17.7 inch, strong elasticity to extend to meet many different sizes of ironing boards, sheets, etc. , Easy to use: Lift mattress and fasten one clip to edge of sheet, the adjustable bed sheet strap keep bed corners in place, never worry about messy or wrinkled sheets again , Design: Sheet straps suspenders is designed with adjustable, extra wide elastic bands meet the stronger tension, keep corners in place and neat, a great beding helper , Applications: Adjustable bed corner holder fit for any kind of bed sheets both King Size, Queen Size, Hospital Beds, Inflatable Beds, Adjustable Beds, Waterbeds, Futons, RVs, and Hide-a Beds