Inflatable stand-up paddle boards (iSUPs) have come a long way from the flimsy, quick-to-deflate boards of a decade ago. Today's premium models rival hardboards in rigidity and performance while remaining portable enough to fit in a backpack. But not every "premium" board on the market actually delivers on that promise. If you're a distributor, retailer, or rental business sourcing inflatable paddle boards, knowing what separates a genuinely high-quality board from a budget k