The next generation of supportive yet agility-focused footwear is here with the Babolat Jet Mach II tennis shoes. These shoes feature the sleek, streamlined design weve seen from the original Jet and Jet All Court shoes from the supportive MatrYX®2.0 upper technology comprised of durable Kevlar® material. Despite the impressive stability and support, the materials on this shoe still help facilitate a light on your feet feel with breathability and comfort from a new KPRS-X cushioning system. Upper: MatrYX2.0 upper technology made with Kevlar and polyamide provides outstanding support, durability, and breathability. Lace-up front offers an adjustable fit. Midsole: Features KPRS-X shock absorption system that consists of an EVA pad made from high quality foam with a specific shape and place to better protect the heel and foot. Outsole: Michelin Premium DIN 20 outsole compound provides durability and traction on all types of courts. Kompressor System provides long-lasting shock absorption and comfort. Sizing Note:Due to the highly durable MatrYX®2.0 with Kevlar® upper material, the Jet Mach II has a very snug fit. Though fit cannot be guaranteed without a personal consultation, we recommend that you order at least a half size up from your normal tennis shoe size.