Size: 38 2/3, A training plan is always useful, but without commitment you don't get very far. These adidas running shoes support all your efforts with their incredible Boost technology that provides exceptional energy return. The upper of these shoes is made from recycled materials, allowing you to run with environmental awareness. This model includes PrimeBlue, a high-performance recycled material made from ocean plastic by Parley. 50% of the upper is made from 75% Fillate Primeblue fabric, without using virgin polyester in its production.