Move around the court fearlessly in the Diadora S.Star K IV AG. Diadora has channeled their rich sporting heritage to create a shoe designed for aggressive, all-court players who demand the best from their footwear. Upper: Kangaroo leather upper for durability and comfort. A textile lining with a special anti-bacterial treatment. Unitongue construction lessens irritation and improves fit. Midsole: Molded EVA midsole provides lightweight cushioning. CCB medial stabilizer controls the torsional stability of the midfoot without adding weight or altering shock absorption. Double action2 plus in the metatarsal and heel areas for impact protection and added cushioning. Axeler W5 heel propulsion unit is made from Pebax for greater elasticity during the thrust phase. Power flow ventilation system lets the foot breathe during competition. Removable ortholite insole. Outsole: Duratech 5000 wear-resistant rubber compound lasts longer than standard rubber. All-court traction pattern provides plenty of grip for quick movements. Material: Leather, rubber.