Spirit Den Store Show your White Knoll spirit! Stadium Seat $45 Seat size 20″ wide x 13 1/2″ deep, back size 20 1/2″ x 11 1/4″ high Heavy duty clamp fits virtually any type of wood or metal bleacher Mask $12 Sleek behind the ear design with adjustable banding Ergonomic silicon bead design for adjusting Durable/washable outer layer fabric Comfortable, breathable inner layer is 100% cotton