Leather. - Molded padded sock lining. - Grand.ØS energy foam provides lightweight energy return and maximum shock absorption that reduces fatigue with each step, providing a smooth, luxurious ride. - Grand.ØS anatomical footbed designed to comfort and propel each part of the foot as it carries you through another long day. - Grand.ØS heel strike pad absorbs the impact of your step and returns it as energy. - Grand.ØS torsional arch is a minimal, stabilizing energy-return element that keeps your foot on stride and adds confidence to your step. - 65mm | 2.5 inch hee