Rubber soleUpper: Smooth soft action nubuck leather with mesh fabric detail. Mesh fabric front, tongue and collar panels for breathable comfort. Nubuck overlays at toe, sides and heel, contrast synthetic edging trim.Midsole: Cushioned responsive ULTRA GO comfort platform. Contrast colored midsole trim and outsole detail.Outsole: Lightweight, durable and flexible parametric web outsole provides multi-surface traction. Forefoot flex grooves aid in flexibility and promote a smooth transition. Mid-foot strike zone promotes efficiency in each stride.Weight: 9.1 oz. per shoe in a men’s size 9.6mm heel drop height.