Product Description: This style features Comfortemp®, a revolutionary new material that senses the temperature of your feet. When the foot temperature warms up to 82 degrees, Comfortemp activates to creat a pleasant cooling effect. Also, by absorbing heat it naturally keeps the foot dry and comfortable. When the foot temperature drops below a preset temperature, Comfortemp releases the stored heat creating a warming effect. Features archlock, lightweight, breathable mesh and durable leather. Midsole includes a de-coupled crash zone to soften landing on heel strike, non-visible grid system providing stable cushioning in the heel and an HRC strobel board that increases cushioning and step-in comfort. Outsole has flex grooves that provide flexibility with the natural motion of the foot, a triangular lug design that provides traction and cushioning and XT-600TM carbon rubber that provides traction.