The Finer Details 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. We also rounded the big-toe side of the forefoot for better agility and quickness when making sudden movements. The more supportive the shoe, the more stability it can give to your stance. 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 when digging deep for another rep. The more cushioning that you have underfoot, the more comfortable your workout can be. Cushioning helps soften impact as your feet hit the ground. Laser-siped foam in the forefoot and midsole offers flexibility and comfort. The upper is made of breathable, supportive engineered mesh with built-in stretch where needed, like lunging, squatting and jumping. 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. A comfortable inner sleeve increases ankle support and provides more seamless fit. Nike Womens Free Metcon 6