Responsive training shoes for explosive sessions Agility drills to the squat rack, the men's Reebok ERS Training shoes help you put in the work. ERS technology provides premium cushioning, stability and energy return for a springy, bouncy feel, propelling you through your workouts. A breezy, mesh upper features molded overlays to keep your feet locked in as you grind. Cutouts in the outsole reveal the shock-absorbing SuperFloat foam core.