Updated with Side 2 Side dynamic response system in forefoot and continues Kompressor System cushioning and a new Cell Shield pattern on the upper. Foot Belt provides tailor-made four-point foot support. Improved court propulsion thanks to the use of Babolat Exact Pro technology. Durable, cushioned, and stable, the Propulse 4 remains a solid all-around choice. In keeping with French tradition, Babolat continues with the excellent OCS outsole made by Michelin to provide enhanced traction without sacrificing durability.