Rubber sole Breathable mesh upper for ventilation Huarache-inspired strap to lock in your foot '90s rubberized Huarache logo nods to the iconic sneaker Rubber striped sidewall cradles the foot for added stability Nike Free technology enhances flexibility and agility The Nike Free Metcon 4 combines flexibility with stability to help you get the most out of your training programme. Updated "chain-link" mesh cools and flexes as you speed through agility drills, while support at the midfoot and heel braces you for your heaviest sets in the weight room. Dark and light pair up to celebrate the motivational edge of training with a partner.