The Nike Free Metcon 4 combines flexibility and stability to help you get the most out of your training program. The revised mesh "mesh effect" provides maximum coolness and flexibility for acceleration during agility drills, while the midfoot and heel support cradles your foot during the hardest workouts in the weight room. The 4 brings back the ultra mesh - durable and breathable fromorigine. The upper features Huarache -inspired webbing and a striped rubber side wrap that wraps around the heel to anchor your movement to the ground, no matter the direction. The Nike Free technology in the forefoot provides optimal flexibility during agility drills and sprints. The stretch collar allows the foot to move naturally as you accelerate, change direction and slow down. The wide heel creates a solid base when lifting weights. The softer foam core cushions your foot, while the firmer outer layer provides durability and stability. The wide inner lacing system distributes pressure around the midfoot for a comfortable, supportive feel during quick stops and quick changes of direction. The rubber logo on the tongue pays homage to the Huarache of the early 90s. Rubber outsole in wear areas for lasting traction.