The Nike Free Metcon 3 in Iron Grey features a performance training design with an entirely neutral finish. The sneaker’s dark grey mesh upper includes no-sew overlays and webbing pull loops at the tongue and heel for easy on and off. The foam midsole integrates flexible Nike Free technology in the forefoot with the Metcon’s signature wide, flat heel for added stability. Hidden Volt accents bring vibrant pops of color to the sockliner and rubber outsole.