The outsole material designed specifically for hard court play. This version of the women's New Balance FuelCell 996v4 tennis shoes in White / Citrus Orange are made with a supportive synthetic mesh and Hypoknit upper over a full ground contact outsole that helps offer you the good footing you need to dominate the court. Plus, a new-and-improved full-length FuelCell midsole provides the NB's most pinnacle propulsion and energy return. This NB tennie features a full-length NDurance non-marking outsole. 8 mm drop; due to variances created during the development and manufacturing processes, all references to 8 mm drop are approximate. Adjustable lace closure for a customized fit. FuelCell foam delivers a propulsive feel to help drive you forward. Full-length Ndurance outsole provides superior traction and durability to help get more wear out of the shoe. Hypoknit upper designed to provide strategic areas of stretch and support. NDure upper technology designed for superior durability. Synthetic upper material for a lightweight feel.