Newton Running Mens Isaac S NA Imported Seamless Upper With An Open Weave Mesh - Allowing ventilation to flow throughout the shoe, keeping the feet feeling cool. No-Sew Overlay - Providing optimal foot conformity and reduces the risk of irritation. Enhanced Metatarsal Stretch Panels - Helps to accommodate the shape of your foot. 360-Degree Reflectivity - Ensuring visibility in low light conditions. 5 Lug P.O.P 2 Platform - Provides beveled lugs which allow for a smoother ride.