Brand new with box. Price is firm. No trades. The Nike Metcon 3 is the third installment in the series of the training sneaker from Nike that is designed for high-intensity, Crossfit-style workouts. This low-top features a mesh upper, welded overlays, and a heel clip for added stability. The tread pattern wraps its way up up the sidewalls of each shoe. This particular pair opts for a stealthy all-black look with grey detailing.