Features: - Universal paddle-board seat - form-fitting design for all body sizes, large & small - can also attach to compatible kayaks, rowboats, fishing boats - perfect for adding additional safety & comfort - construction materials: polyester, engineered EVA, copper metal hooks technical specs: - seat/base dimensions (L x W): 15 x 13 - back rest dimensions (L x W): 18 x 20 - unit weight: 2. 4 lbs.