The YETI® Cooler seat cushion has at least 2" of dense foam (3" in the 125qt, 155qt. & 250qt. cushions) and is made of tough, white, UV marine vinyl stitched with GORE® TENARA® Sewing Thread. Screw the included studs into the cooler lid and snap the cushion in place. Available for all YETI® Tundra models. All hardware is stainless steel.