Roto-molded, high density polyethylene seat backs and bases are designed for comfort, good looks and durability Virgin foam with a 1.5 density and no in fillers in for lasting comfort Film barrier between foam and vinyl allows quick recovery Heavy-duty 28 oz. marine-grade vinyl is mildew resistant and UV treated to withstand fading Injection molded ergonomic seat frame system designed for ultimate all-day comfort. Features contoured lumbar back with integrated cushioning, superior durability and moisture mitigation. Compression foam padding. Heavy-duty 28 oz. marine grade vinyl. UV treated and mildew resistant. Mounts on any 5-1/4 in Hole Pattern Pedestal or Mounting System. 3-year warranty on frame. 3-year warranty on upholstery.