La Sportiva's Testarossa was designed for the highest performance climbing (no matter what level). This shoe is a revolutionary leap in performance climbing footwear. The Hytrel anatomical midsole and asymmetrical shape combines for a precision, glove-like fit that gives the ultimate balance of power and sensitivity. The Vibram® XSV rubber with unique tension rand and dynamic slingshot heel band focuses power to the toe box. The Bi-lateral, variable stretch control allows the climber to maximize power to the big toe via the down-cambered toe platform. And with the lace-up style, you can dial in the fit for more precision and comfort.