Yeti Realtree Cooler Cushion for Tundra 35. Turn your YETI cooler into a comfortable seat. The YETI Cooler seat cushion has at least 2" of dense foam (3" in the Tundra 125, Tundra 155 and Tundra 250 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. All hardware is stainless steel.