Chair Cushions 4 Pack Memory Foam With Non Slip Backing 15.5x15.5x4 BlackPlush, stable comfort for every seat. This 4 pack of tufted memory foam chair cushions brings luxury to dining rooms, kitchens, and living spaces while the non slip backing and built in ties keep each cushion perfectly in place. Double anti slip design: non slip bottom plus two long ties for secure placement, reducing constant adjustments. Universal fit: each cushion measures 15. 5" x 15. 5" x 4" and works on most dining chairs, kitchen chairs, and