1.A flip up bolster allowing it to act as either a supremely comfortable seat or as a leaning post; 2.Roto molded plastic substrate with full upholstered cushion; 3.Heavy duty marine grade vinyl or fabric and high density foam; 4. For additional storage, a pocket with elasticised top is incorporated in the seat back. 5. The flip up hinge made from corrosion-resistant aluminum and with Stainless steel hardware ; 6.Meets the test Standards recommended by ABYC.