adidas Ubersonic Women's Tennis Shoe SPEED-ENHANCING HARD COURT SHOES MADE TO RETHINK OUR MATERIALS. The ultimate expression of speed on a tennis court. When you lace up these lightweight adizero Ubersonic 4 shoes, you can be sure they'll complement your all-action style. Engineered for agile play, their snug woven mesh upper is reinforced from within to add stability during sidesteps and slides. Sitting on that durable hard court outsole, a Lightstrike midsole keeps you close to the ground for quick reactions. MADE TO RETHINK OUR MATERIALS For this product we turned to a greenhouse gas technology. It uses captured industrial emissions as a new material feedstock. CO2 is fermented into ethanol which constitutes 30% by weight of a polyester yarn. We knitted this yarn into various products and now this carbon-based ethanol makes up a minimum of 9% by weight of this shoe upper. With the help of innovation, we are seeing possibilities in turning towards new resources. LIGHT MAKES FAST adidas Lightstrike provides super-light cushioning for next-level speed. HARD COURT OUTSOLE An Adiwear outsole with a herringbone profile creates the perfect balance of traction and durability on hard court surfaces. ADITUFF FOR BEST ABRASION RESISTANCE IN THE TOE AREA Abrasion-resistant Adituff wraps around the toe and medial forefoot to help protect against foot drag that occurs during serves, volleys and extreme lateral movements. Details: Regular fit Lace closure Reinforced mesh upper Knitted sock Lightstrike cushioning Adiwear outsole Upper contains a minimum of 50% recycled content Imported