The Bigshot is the fastest tennis shoe on the market. Tested by P3 Sports Science institute. 13.5oz. 6-month outsole wear guarantee. Superfoam foot bed for resilient full-length cushioning. Guideglide stability midsole construction for world class comfort during fast movement. Ballistic Propulsion Plate to help keep players on the balls of the feet during play. Aosta 7.0 high abrasion rubber outsole for long lasting traction.