K-Swiss Vibrant 3 Tennis Shoe Mens Midsole Material: Compression-Molded EVA--The EVA material is heated, reducing the density, for a lighter weight. Outsole: Aosta II--Rubber outsole delivers durability and flex thanks to multi-directional flex-grooves. Cushioning Technology: Shock Spring Technology--Shock Spring technology provides excellent cushioning. Model Number: 02175-109 Classification: Court