The SUP Deck Bag comes from the legacy of Sea to Summit's Big River Dry Bags. Sea to Summit has shaped a dry bag specifically for use on stand-up paddleboard decks. To fasten these bags to your deck Sea to Summit uses their Self Adhesive Lash Points and the most trustworthy adhesive on the market - 3M VHB for maximum adhesion for whatever conditions you can throw at it. There's also no reason to limit yourself to SUPs - this bag is equally useful on all manner of kayaks, boats, and rafts.