Work harder and workout faster with a pair of the nike train speed 4 training shoes in black and white the perfect trainers for those who hit the gym dailythe train speed 4 has a lightweight durable breathable upper that ensures your feet stay feeling cooler and more refreshed when put into action and a full inner sleeve delivers a sock like fit diagonal flywire cabling in a crosshatch pattern helps keep your foot locked down in place as you make quick lateral cuts from lifting to sprinting