Stable Triangle Design A triple protection to keep your sheet tiny all the time, no worry about pulling and tucking to straighten out your sheets every night Durable & Stronger The elastic wide bands provides stable and metal stronger clamps for heavy duty purpose, easy to apply and remove Adjustable Length Allows desired tension and can be adjusted to fit all edge of sheet. The middle plastic clenching to keep the fabric from damaged Original Packaging Our products come with original packaging, Perfect for Futon, split mattress bed, air mattress, foam mattress, pillow top mattress and also can be used on tablecloth covers, grill covers, car/boat/motorcycle/scooter seat covers, couch/chair seat covers and more