adidas Running - a3 Terrain (Aluminum 2/Collegiate Royal/Matte Silver) - Men's: The a3 Terrain W is unstoppable cushion for the trail. Giving trail runners the same smooth ride and responsive feel road runners have enjoyed for a few seasons now. Mesh nylon upper. adiPRENE + in the forefoot provides a resilient toe-off. adiPRENE in the heel absorbs shock on impact. TORSION provides adaptive midfoot support. TRAXION outsole grips without slippage, making it ideal for use in any outdoor sport requiring maximum outsole grip. |