The Free Metcon 6 workout shoes feature forefoot flexibility and reinforced heel with extra foam for freedom during dynamic movements. The laser-siped outsole provides flexibility, while the rounded big-toe side of the forefoot enhances agility. Additional heel foam improves stability. The laser-siped foam in the forefoot and midsole offers comfort. The upper is made of breathable, supportive engineered mesh with built-in stretch where needed. Flywire cables give you a dynamic fit and help keep you secure. The multi-surface traction pattern is suitable for any workout surface and activity. A comfortable inner sleeve increases ankle support and provides a more seamless fit. These athletic sneakers by Nike are size 13.