NIKE Men's Zoom Vapor 9.5 Tour White/University Red/Black 631458-160 (11.5) Synthetic Weight: approx. 12.8 oz. The firm Phylon midsole works with the Nike Zoom Air unit in the heel to deliver low-profile, ultra-responsive cushioning for comfort. The Dynamic Fit system that wraps from your laces to the top of your arch helps keep you grounded and stable to meet each serve. The lightweight textile upper provides breathable support for long matches. Rubber outsole with an extra durable heel and forefoot for excellent traction