The Wilson ETF (Eat The Fuzz) is a light weight training/cardio shoe. Built on the last of the Wilson Open performance shoe, the ETF features the same midsole and outsole technologies, but its lighter weight upper doesn't offer the support required for match play or vigorous hitting sessions. The excellent comfort and cushioning makes this one perfect for trips to the gym as well as a great after match shoe. Overall the shoe offers a very comfortable ride and excellent ventilation. The soft uppers require no break-in and feature a Velcro strap for support. Fit: Length fit is true to size. Medium width and medium height arch support. These shoes offer a comfortable ride, excellent ventilation and require no break-in. Upper: built on a contoured last. Soft, synthetic uppers in lightweight breathable mesh and a Velcro Stable Strap for stability. Toe guard for improved durability. Inlay: Perforated polyurethane sockliner. Midsole: Blown Cushion Core inserts in the heel and forefoot. Deep heel cavity DST 3x heel cushioning technology. Ventilated TPU Arch Bridge. Outsole: Modified herringbone patterned outsole in Duralast Supreme for the forefoot and heel strike areas. Color: White / Grey Weight: 12.1 ounces (size 8.5)