DESCRIPTION Speed helps save time. And time, to score points. That''s why the adidas Adizero Ubersonic 4 tennis shoe is designed to get you to the ball faster. It features an elastic fabric upper, an external heel stabilizer for more explosive sprints and internal reinforcements for greater lateral stability. It combines a low-profile Lightstrike midsole that cushions impacts and a grip Adiwear sole. HEAT technology. RDY allows you to perform at your best on the hottest days.