The Nike Free Metcon 6 Workout Shoes supports every grunt. The forefoot flexibility is increased for dynamic movements during plyos and cardio classes, plus the base needed for weights. The outsole is laser-siped for better flexibility. The big-toe side of the forefoot is rounded for better agility and quickness when making sudden movements. More foam is added 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. The sneakers feature lace up closure. Multi-surface traction pattern is made for any workout surface and activity. Comfortable inner sleeve increases ankle support and provides a more seamless fit.