The latest in mesh technology features an elastic design that intertwines with the knitted upper, helping your foot feel secure as you run. They offer for a lightweight, breathable and durable feel that keeps your foot comfortable. Non-slip Sole:Increased rubber at the outsole helps deliver better traction and durability. Air Cushion Design:Full-length Air unit gives a smooth, snappy feel.The Air unit delivers unrivaled, all-day comfort. Perfect For : Running, jogging, trail, cross-training, gym, walking, cycling, camping, fitness, tennis, marathon, exercise, casual, travel.