Premium Series Pontoon Radius Corner Cushion Set Only. Lift-up seat cushion design for storage access when attached to Premium Series Base (sold Separately). Contoured cushions with high compression foam padding. 28oz marine grade vinyl withstands the effects of the sun, heat, rain and staining under normal marine enviornment conditions. Perfect color and style match with Horizon Manufacturing Premium Series Pontoon Components Seat Cushion Dimensions: Width-25.25", Depth-32.75", Seat Depth-23.25", Seat Height-18"; Back Height with Base-29.75"