Sturdy and high-tech, the Nike Metcon 4 XD revamps the previous Metcon 3 model with enhanced haptic technology across the upper, 6 eyelets instead of 5 for a tighter fit and more padding between the forefoot and laces. Whether box jumping, kipping or walking from car to gym, the tough and contemporary Metcon 4 XD 'Dark Camo' is traction-ready for strength building and endurance training.