The Summit collection seat pad, shown in a stack are sold each. Crafted from Sunbrella outdoor, solution dyed acrylic, performance fabrics designed to hold up to the element outdoors. Add comfort of this plush cushion to a cast aluminum chair with a foam core for support.These durable seat pads will hold their place with the velcro corner attachments. Note: recommend to stand up the cushions on end to dry faster if caught out in the rain for a faster dry. Easy clean up from picnic spills with cool water and mild dish detergent or see the Sunbrella cleaning instructions.