SPEED-BOOSTING HARD COURT SHOES MADE IN PART WITH RECYCLED MATERIALS. Speed buys time. Time earns points. That's why these adidas Adizero Ubersonic 4 tennis shoes were designed to get you to the ball faster. Their foot-hugging stretch-woven upper and external heel counter keep you strapped in for explosive sprints. Internal reinforcements add extra stability through slides and sidesteps. Underneath, a low-profile Lightstrike midsole and grippy Adiwear outsole combine to ensure you're always first to react on hard courts. Lace closure Mesh upper with inner knit sock Adituff toe Lightstrike cushioning Adiwear outsole