Keeps sheets tight and secure The bed sheet holder grips the corners to keep sheets snug on the mattress, reducing loose or wrinkled bedding. Ideal for restless sleepers to prevent fitted sheets from slipping off. High durability Made from robust, high-strength plastic. This non-slip lumber lock fitted sheet is built to last, tear-resistant, and resistant to losing its shape with frequent use. Quick and easy installation No need to lift the mattress. Insert the sheet corners into the holder, place the sheet neatly, then slide the fastening straps into the holder tracks to secure everything. Size: 20 cm x 16 cm x 12.7 cm. Enhanced comfort Heavy-duty fasteners provide a secure grip, keeping sheets flat and firm. No more waking up to tangled or loose sheets for a comfortable, undisturbed sleep. Use scenarios - On beds where fitted sheets tend to slip or wrinkle, especially for restless sleepers. - When changing sheets or making the bed is quick and straightforward without lifting the mattress. - In households with multiple sleepers or active movement during sleep, to maintain a smooth, secure sheet surface.