The NSI Dry Box Seat Pad is a heavy duty, self-adhesive EVA / closed cell minifoam that is perfect for adding padding to your drybox, cooler or just about any flat surface. Diamond cut dual density foam is super durable and provides plenty of cushion despite its thin profile. 1/4" top layer of EVA is cushioned by a 3/8" soft closed cell foam layer for durable support and comfort. 3M peel-and-stick adhesive bonds to nearly any smooth surface.