The Portable Extra Thick stadium seat cushions is designed for maximum comfort and durability at any outdoor event. Measuring 21 x 15 x 3 inches, this versatile cushion fits all types of stadium seating, including bleachers, and can be used vertically or horizontally for wider comfort. Its waterproof polyester construction and anti-slip rubber bottom ensure stability and dryness in any weather. The bleacher cushions for adults also features a front personal pocket, cup holder, and safety straps that double as shoulder straps for easy transport. Ideal for use as football stadium seats, canoe seat, or airplane seat cushion, it's perfect for outings, camping, fishing, picnics, and more.