AOSTA 70 OUTSOLE Highdensity rubber compound outsole provides unsurpassed durability from heeltotoe DRAGGUARD 70 Located in the high wear areas of the toe and heel offering elevated outsole durability DURAWRAP FLEX UPPER A durable yet light material that provides protection and flex so there is no breakin period HEEL GRIP LINING Made of interlocking fibers that grip the sock to minimize heel slippage SURGE 70 MIDSOLE Lightweight premium cushioning system providing maximum energy return