We had a 1997 3.5 metre MkII futura that looked very similar to that and it was Hypalon. Cost was AUD$4k back then. Has the hydrofoil speed tubes and we fitted it with a Yamaha 25 twin carby model.
Even with the speed tubes it did not go any faster whatsoever than the same model without the speed tubes as I found out one day when racing an almost identical boat and motor combination. We got a slow leak in one of of the hydrofoil tubes which was annoying. Seemed like a good idea when we bought it, but the hydrofoil tubes weren't really necessary.