The Freein Kid's inflatable SUP boasts the strongest iSUP structure on the market, featuring DOUBLE LAYER construction with TRIPLE/QUAD Military Grade PVC coatings on the deck and side. On the deck a TWO-layer PVC coated tarpaulin is bonded to a PVC coated drop stitch core. Two of these PVC layers reinforce the sides. This makes the SUP board lightweight, extremely durable, with the performance of a hardboard.