Xelero Women's Matrix II Sneaker Leather Lug Sole sole The Xelero XRS Technology provides greater stability and control. This cutting edge system supports natural gait pattern. The XRS technology is integrated in the midsole. The flat outsole provides optimal stability, while the propulsion element promotes a laterally stable forward propulsion, without changing your natural gait pattern and without losing your balance. High quality leather upper Dri-lex Lining. CM EVA Midsole. EVA Strobel Insole. Gel pads in the forefoot and rearfoot Sizes: 6-12 - Widths: B, D, 2E