Mesh adds breathability to the clean leather upper, while a rubber outsole grounds each step with superior durability. Visit Our Store Contact Us New Balance Women's Sport Slip 900 Shoes Blue with Blue & Pink Mesh adds breathability to the clean leather upper, while a rubber outsole grounds each step with superior durability. Leather/mesh upper Removable EVA (Ethyl Vinyl Acetate) foam footbed for cushioning 8 mm drop: due to variances created during the development and manufacturing processes, all references to 8 mm drop are approximate Fresh Foam innovative midsole created from a single piece of foam that provides a plush, more natural ride.