The Free Metcon 6 supports dynamic movements during plyos and cardio classes, plus a stable base for weights. The more flexibility that you have in the midsole and outsole, the more you can move naturally. Nike laser-siped the outsole for better flexibility, whether you're jumping, planking or powering through plyometrics. Nike also rounded the big-toe side of the forefoot for better agility and quickness when making sudden movements. A combination of tuned support and intentionally placed cushioning helps you feel secure with every step. Nike added more foam in the heel for improved stability. Laser-siped foam in the forefoot and midsole offers comfort. The upper is made of breathable, supportive engineered mesh with built-in stretch. Flywire cables give you a dynamic fit and help keep you secure during your workout. Multi-surface traction pattern is made for any workout surface and activity. Comfortable inner sleeve increases ankle support and provides a more seamless fit. They have a lace up fastening and are athletic sneakers.