If you are into road cycling or triathlon, then order the Ultralight Men's Road Bike Shoes. They are ideal for training and competition, but not for riding and cycling. The outsole of Ultralight Men's Road Bike Shoes with Carbon Fiber is made of carbon. It is lighter and tougher than plastic, better transfers the force to the pedal. If you are choosing shoes for sports, choose carbon fiber. They fit perfectly on the leg. The principle is simple: the less padding, the lighter the shoes, and the better the pedal contact. If you want speed and cool sports equipment, go for carbon fiber stiff shoes.