Amazon.com: Naturesroom Sunbrella Patio Cushions - 20.5" W x 49" L x 2" T, Outdoor Adirondack Chair Cushion with Comfort, Style & Durability Designed for Outdoor Living - Made in The USA :
Amazon.com: 47" x 21" x 2" Adirondack Chair Cushion with Ties (Sunbrella Aruba) : Patio, Lawn & Garden
Home Decorators Collection 20.5 in x 18 in. Sunbrella One Piece Outdoor Adirondack Chair Cushion in Canvas Black AH1N128B-D9D1 - The Home Depot