Durable aggressive traction and lightweight speed make the Nike Air Zoom Wildhorse 4 the toughest trail shoe around. Abrasion-resistant mesh upper combines durable protection and a breathable feel. Flattened Flywire cables incorporated into the top eyestays lock the heel securely in place eliminating wiggle room and preventing injury on uneven terrain. Phylon foam midsole for lightweight responsive cushioning and great ground feel. Zoom Air unit in the heel absorbs the force of impact and returns it as energy at toe-off for a faster more efficient stride. High-abrasion rubber perimeter with Waffle outsole lugs for durable traction in both wet and dry conditions. Wt. 11.2 oz.