This professional-grade 21-inch portable stadium seat by SEEUTEK (Model BZ-1481-new-1) features an integrated dual-zone USB-powered heating system with three adjustable heat levels reaching up to 150°F. Designed for maximum comfort on bleachers or benches, it includes high-density memory foam cushioning, six adjustable reclining positions, and flip-up armrests that expand the seat width to 21 inches. The durable construction utilizes waterproof 600D Oxford cloth and a non-slip PVC leather base with raised traction granules. For convenience, it is equipped with five storage pockets—including a dedicated power bank compartment and cup holder—and features integrated backpack straps for hands-free transport. This unit includes two seats and is compatible with standard 5V/3A USB power banks