FRAME: Rotationally-molded, marine grade polyethylene from, designed to resist warping with thicker poly, added support and unique molding lines. STORAGE: Large dry storage area under hinged seats, livewell ready compartments, channels built into the bases assist with drainage. COMFORT: Multiple foam densities provide support and comfort. Furniture depths and heights are sized for comfort onboard. CORROSION RESISTANCE:- Aluminum seat hinges- Stainless Steel staples & mounting fasteners. VINYL OAM: - Premium marine grade vinyl - Mildew, UV resistant laminated vinyl - Bonded, polyester, color fast, UV-resistant threads- Mildew resistant polyurethane foam.