The New Matrix II has a dual density PU footbed and a second EVA insert for fit customization. Matrix II is perfectly suited for walking and light running. The mini-lug outsole is suitable for roads and easy terrain. The patented Xelero technology ensures stability while encouraging forward motion. The Xelero midsole provides light-weight cushioning while the seamless lining optimizes comfort. The EVA insole provides another layer of cushioning comfort. The lining material wicks moisture away, keeping your feet cool and dry.