Nike Dunk Low INNOVATIVE CUSHIONING AND TRACTIONThe Nike Zoom Speed Trainer 2 Men's Training Shoe is made with low-profile cushioning and strategically placed delta nodes for premium impact protection and versatile traction. Forefoot straps and mesh fabric keep your foot locked in place while maintaining airflow.BenefitsMesh forefoot provides breathabilityForefoot straps integrate with the laces to give you excellent lockdownTextured synthetic overlay from heel to midfoot for lightweight supportZoom Air unit in heel creates low-profile, responsive cushioningHigh-grip delta notes are engineered for maximum traction on multiple surfaces