The Nike Free Metcon 6 supports every movement with forefoot flexibility and a reinforced heel. It provides more freedom for dynamic movements during plyos and cardio classes, plus a stable base 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 stretch. Flywire cables give a dynamic fit. The multi-surface traction pattern is made for any workout surface and activity. The inner sleeve increases ankle support and provides a seamless fit.