Nike ACG's Mountain Fly 2 has all-round performance specifications to explore the great outdoors and battle harsh winters in the city. The shoe has a sturdy but breathable upper lined with GORE-TEX and detailed with robust rubber sidewalls, extending from a traction outsole for grip and stability. Grey - Textile upper, rubber outsole - GORE-TEX lining - Foam midsole cushioning - Lightweight plate - Toggle closure - Regular fit - Style code: HF6245003 Nike ACG Mountain Fly 2 GORE-TEX