Upgrade any hard seat with the Alpcour Portable Extra Thick Stadium Seat Cushion. Measuring 21" x 15" x 3", this plush padded cushion provides exceptional comfort on bleachers, benches, and outdoor seating. Durable waterproof construction, an anti-slip base, convenient storage pocket, built-in cup holder, and lightweight portability make it the perfect companion for sporting events, camping, kayaking, concerts, and everyday outdoor use. Features Generously sized 21" x 15" x 3" extra-thick cushion Thick high-density foam cushioning Durable waterproof polyester exterior Anti-slip rubber bottom Front storage pocket and built-in cup holder Lightweight design with carry handle and shoulder straps