Design: Breathable engineered mesh upper for durable breathability GuideRail™ acts like a supportive highway guide rail that encourages natural foot placement In-Shoe Comfort: FootShape™ comfort gives your feet more space to sit naturally and is designed to address biological differences in men's and women's feet Balanced Cushioning™ platform positions your heel and forefoot at an equal distance from the ground, encouraging better alignment, better form, and a low impact landing Altra EGO™ foam is designed to provide an added energy return upon push off Innerflex™ grid-like grooves in the midsole are designed to provide flexibility and natural movement Molded heel-cup for a secure feel High cushioning Durability & Traction: FootPod™ outsole maps the bones and tendons of your foot to help it bend and move naturally Additional Details: Weight: 8.3 oz. / 235 g Stack Height: 28 mm