Adidas men's running shoes with a lightweight Boost sole with a significant return The Adidas Ultraboost 21 men's running shoes are a great model for your running performance. Boots with a Boost midsole are designed to maximize cushioning and energy return. When running, you will appreciate the weight, comfort and power of the active suspension. The new Torsion System increases the stiffness of the front of the shoe by 15% for a more dynamic run. In addition, this model is partially made from