Product Description: Material: Nylon + metal clips. Color: Black. Size: shortest (relaxed state) 100-150 cm, longest (stretched state) 200-250 cm. Weight: 132g. Package Contents: 2 x Bed Sheet Straps. Description: Sheet Fasteners: Made of high-quality nylon + metal clips, very elastic and suitable for most fitted sheets and flat sheets. These sheet straps keep your sheets in place without readjustment and hold them in place all the time. And will never damage your mattress. Sturdy Clips: Wide elastic provides a stable and stronger grip for heavy-duty purposes. The metal clips hold your sheet in place. Highly elastic sheet straps provide stable and strong support for your sheets. Adjustable Corner Fastener: The sheet holder is adjustable, allowing you to find the tension you want and keep your sheets organized all day. Easy to Use: Several simple steps to attach and keep your sheets in place to prevent your sheets from slipping off the corners.