Performs Like a Hard Board Riding a rigid inflatable SUP will make you feel like you’re on a hard board without compromising stability or performance. Many inflatable stand up paddle boards (SUPs) on the market are still only 4” thick and pretty difficult for an adult to comfortably ride because they bend too much. Our inflatable SUPs have been at least 6” thick since we first produced them years ago, making our boards 4x as rigid with 2x the weight capacity. The added benefits make SUPs a great option for beginners and tandem riders alike.