BOOST cushioning provides a responsive, springy ride with every step Low-to-the ground stability ensures a stramlined run ContinentalTM Rubber outsole for extra traction in wet and dry conditions Life is a game that moves as you play. adidas blended aspects of the virtual and the actual worlds to create these X9000L3 running shoes. Responsive cushioning in the forefoot and lightweight cushioning in the heel combine to keep your stride smooth and comfortable. THe BOOST sole combines these two aspects, resulting in a more energised run and a runner who can go further. The outsole tread pattern was inspired by computer-generated data and provides reliable traction on city streets.