The Propulse 3 shoe is an innovative all-court shoe, endorsed and worn by Andy Roddick that has been designed to offer fantastic support and comfort.The Exact Pro system generates a dynamic impulse in lateral movements, as a result of a dynamic camflex and Pebax rebound fishbone, to make for faster response, tighter reaction time and more efficient footwork.The sole has been developed with the research and development team of Michelin to deliver a sole that provides high performance over a longer period of time. The same development has led to the Optimised Cell System that uses circular micro-cells for improved traction. The restored energy transfer is thus optimised during compression and release phase.The shoe features a Kompressor System with EVA cushioning and filled tubes of Thermo Plastic Rubber. When the heel hits the ground the shock is absorbed and the energy is compressed into each tube to make for high levels of comfort and efficiency. At the end of the impact the tubes then regain their original shape and the energy is restored in a dynamic response.The Foot Belt support offers support in three ways; a front strap for instep support, two side hoops for ankle support and ergonomic TPU counters for heel support to give an even distribution of pressure. The independently adjustable straps allow high-precision adjustment.The Cell Shield upper works hard to prevent abrasion in high wear zones, providing brilliant comfort and ventilation.The Ortholite insole is made using shape-memory foam ensures additional comfort during the first wear and more importantly, during play on the court.