Continuing the evolution of our best-selling franchise, the Rush Pro 4.5 builds on the innovations of the 4.0 with new upgrades that improve breathability, support and abrasion resistance. The engineered mesh upper has a graduated pattern, with a larger hole mesh toward the front to promote airflow and a tighter mesh toward the heel for support. A larger, integrated medial mud guard provides all-around protection and support, while the enlarged rubber drag pad on the lateral side is extra thick to resist abrasion and anatomically shaped to follow the foot's profile.