The Liquifect-injected heel cushioning delivers step-in comfort that won't break down over time for a consistent feel on every run. These Reebok Liquifect Sport men's running shoes in Grey are built with a polyurethane compound injected into the heel for cushioning that won't break down over time. The lightweight mesh upper offers breathable comfort and a supportive fit. You'll wish your schedule were as consistent as your shoes. Color: Pure Grey / Black / Vivid Orange.