New Balance calls the grey color of this model of their Verison 3 motion control 1540 trainer "Marblehead." You'll call the shoe exceptioaly supportive and stable,�thanks to its unique ENCAP and Rollbar��midsole technology. The synthetic/mesh upper is designed to give you maximum comfort as you run. Removable polyurethane insert. Durable blown rubber outsole with 10 mm drop. Made on the roomy SL-2 last. Limited stock in men�s 4E and 6E widths.