UltraBoost 21 M
The new Torsion System provides a 15% increase in forefoot bending stiffness for a more responsive run.
INCREDIBLE ENERGY RETURN
6% more Boost capsules ready to explode with energy in each step.
This product is made with Primeblue, a high-performance recycled material made in part with Parley Ocean Plastic. 50% of the upper is textile, 75% of the textile is Primeblue yarn. No virgin polyester.