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 recycled Parley Ocean Plastic yarn. Shoes with a grippy construction fit great. Fixation of the leg is ensured by means of classic laces. The Primeknit+ upper is a patented technology, it is a special fabric that resembles a sock, so it perfectly adapts to the foot, it is also breathable, light and flexible. Material: synthetics, textile