Wilson Rush Pro Tour Mid Men's Tennis Shoe - Blue/Black/Poppy Red Size 7.5 US 4D Support Chassis 2.0 splits chassis into two pieces: one running under the foot for forward propulsion, the other running laterally from heel to toe for superior stability and control; Energy Cell comprises a lightweight EVA foam in the forefoot of the midsole to create softer feel and optimal body weight transfer for explosive acceleration Sensifeel 2.0 features a minimally layered upper with an engineered mesh for enhanced breathability, feel and comfort; DF2 provides cushioned court feel, yielding compromise between comfort and quick performance (DF2 = HT Drop 9 mm) Rubber Medial Drag Pads supply added durability and protection when dragging the foot; R-DST+ offers the best combination of cushioning and rebound for more dynamic performance Duralast consists of a high-density, consummately durable rubber compound that provides abrasion resistance and maximum traction on all surfaces; Designed for best performance on all court surfaces.