Keep furniture covers in place! Flexible PVC grippers help prevent shifting and slipping of covers - just tuck and forget. Simply insert the reusable plastic grips between the furniture and seat cushion to hold covers secure. No more wrinkling, repeated adjusting, or re-tucking. Install in seconds and removes easily. 100% PVC. Set of three comes with two short sized sections measuring 18" long, and one long size section measuring 23.5" long.