This 4 pack of cushions was developed specifically for the Summit Collection of transitional design cast aluminum furniture. Covered in a textured. Sunbrella. acrylic. performance, outdoor fabric (Fife Pyrite) these cushions will be durable. Filled with a foam core & a polyester wrap for comfort and then accented with matching welt and velcor corner ties. This cushion is sold as a set, but additional cushions are available sold separately. Note: easy to clean, follow the Sunbrella cleaning instructions or just spot clean with mild dish detergent and rinse well. Seat cushions dry fastest if cleaned or caught in the rain by standing on end in the chair and let the water drain out of the back of the seat cushion.