Designed alongside while on earth™ co-founder and San Francisco 49ers running back Christian McCaffrey, and tested over a year of rigorous training, the CMC Trainer delivers maximum control without sacrificing comfort. A tough, breathable nylon upper withstands high-output workouts while keeping your feet cool under pressure. From heavy strength sessions to quick lateral agility drills, this versatile trainer provides a locked-in fit and dependable support through every rep.