xperience a smooth run with the Ultra 4DFWD running shoes. They combine the upper of our iconic Ultraboost with a 3D-printed adidas 4DFWD midsole that's innovated to compress forward, reducing braking forces and transforming the impact energy into forward motion. The result provides a smooth transition and unique gliding experience. An adidas PRIMEKNIT upper hugs the foot with targeted areas of support, while the Continental™ Rubber outsole provides extra grip in all weather conditions.