Sunbrella Outdoor/Indoor BOXED STYLE SEAT CUSHION by Comfort Classics Inc. Renew your outdoor patio furniture with a new Sunbrella BOXED STYLE SEAT CUSHION the dimensions of this seat cushion is 18W x 18Dx 3H and it has boxed edge construction. Comfort Classics Inc. has over 50 years of experience in the outdoor cushion industry. We take pride in our cushions and customer satisfaction is our No.1 priority. Sunbrella Fabric is one of the durable fabrics for outdoor use. All Of our cushions are made with Quick Dry Comfort Technology which makes your cushions Dry Rapidly Sunbrella Boxed Style Seat Cushion BOXED STYLE SEAT CUSHION