Fabric PREMIUM MATERIALS: Made of high quality nylon elastic band, plastic buckle and stronger metal clips; In the pursuit of excellent quality, we undergo rigorous testing to ensure that each bed sheet holder is in perfect condition. ADJUSTABLE AND ELASTIC: Our bed sheet holders can be adjusted from 19cm (7.5 inch) to 33cm (13 inch), the maximum stretch length up to 70cm (27.6 inch), extra wide elastic bands can support stronger tension, keep your sheets in place and neat, it's time to say goodbye to messy or wrinkled sheets. EASY TO USE: Easy installation and removal in just a few steps. The stronger metal clips grip the edges and extra corners of the sheets tightly and securely, allowing you to slide smoothly. Practical Bed Sheet Fasteners: Widely used for fastening bed sheets/fitted sheets and other covers such as mattress pads, sofa cushions, mattress pads, tablecloth covers, chair/boat/car/motorcycle seat covers, ironing board covers, mattresses, tablecloths, slipcovers, etc. ;