NAImportedSurface: Road. Differential: 8 mm. Breathable mesh and synthetic upper materials. Seamless upper construction helps reduce the likelihood of irritation. Lace-up closure. Padded tongue and collar. Breathable fabric lining offers a great in-shoe feel. Removable ComforDry? sockliner. FlyteFoam? midsole creates a lightweight, responsive ride. Heel/Toe: 19 mm/11 mm. High-abrasion AHAR? rubber outsole. SpEVA? 45 lasting. Imported. Measurements: Weight: 9 oz PrWarm up and take off towards a new PR in the reliable RoadHawk FF.Predecessor: None.Support Type: Neutral.Cushioning: Lightweight, flexible response.