Designed for: Running, with the Liquifect-injected heel cushioning which delivers step-in comfort that won't break down over time for a consistent feel on every run. These Reebok Liquifect Spring men's running shoes in Black / Solar Yellow are built with cushioning that's injected into the heel for comfort that won't quit. They have a soft mesh upper that keeps air circulating to help feet stay cool. Warm weather and longer days mean more chances to run. Color: Black / Cold Grey / Solar Yellow.