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The Mastia Climbing Shoe is Tenaya's most aggressive kick for stomping your hardest sends yet. Its sharp asymmetry and curved downturn are designed with overhung boulders and technical sport climbs in mind. This is the first shoe that Tenaya made with a thermally molded heel cup to ensure a secure fit as well as complement the rand's long-lasting dedication to maintaining the shoe's downturn for life. It features Vibram's best rubber in the gripping business to ensure reliable traction on greasy plastic holds and slippery rocks alike. Tenaya split the rubber sole at the arch to allow greater freedom of movement to transition from vertical to overhung terrain with equal prowess.