Nike Metcon 8 training shoes, mens 12.5 in Anthracite Blue Lightning These are brand new in the box, never worn. Color block style with a black base. From Nike: You chase the clock, challenging and encouraging each other all in the name of achieving goals and making gains in the Nike Metcon 8 "Anthracite/Citron Tint/Blue Lightning" Men's Training Shoe​. Our go-to model for training relies on a lighter, more breathable upper than our previous edition to complement our standards of durability and comfort, so that you can float through your cardio, power through your lifts and dominate your workouts.