adidas Running - Response Competition (White/Black/Scarlet) - Men's: A well-cushioned running shoe designed for under-pronators to neutral runners. Shoes designed for racing; light weight construction and materials. Open mesh and synthetic leather upper for durable wear. adiPRENE(R) - maximizes heel protection and stability. Shock absorbing material located under the heel provides extra protection from harmful impact forces. adiPRENE(R) plus maintains forefoot propulsion and efficiency. Elastic material located under the forefoot, retains natural propulsive forces for greater forefoot efficiency. TorSion(R) System creates stability and control. Allows natural rotation between the rear foot and the forefoot, provides midfoot support and improves surface adaptability. LightStrike(tm) EVA midsole and a carbon rubber outsole. Shoe weighs 9.1oz.