I have owned every evolution of Predator from the first (with the rubber fins) to the latest Powerswerve series. before this latest evolution was released i never had a bad word to say and they were the ONLY boots i would wear. the addition of the weight in the insole has seriously weakened the midsole and i have had 4 pairs which have all snapped in half, on one occassion i didn't notice and broke a metatarsal as a result. It is a dangerous design flaw and i would urge people to find a new boot supplier or search for old incarnations of the predator boot for real satisfaction.