Thundercat Inflatables are the only approved SLSA IRB manufacturer using RTE composite infusion for all floorboards and transoms. This process enables all products to be exact weights and strengths every time. Murray Edwards from Horizon Multihulls is a structural composite engineer who designed and developed this process for Thundercat inflatables in 1998. Due to this process not 1 IRB has EVER developed a break, crack or stress fracture in their product since 1999. This is testiment to the ongoing development we have within Thundercat Inflatables.