The Free Metcon 6 SE workout shoes open up a world of workout possibilities. Nike added even more forefoot flexibility to the adaptable trainer and reinforced the heel with extra foam. 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 has been added in the heel for improved stability. Laser-siped foam in the forefoot and midsole offer flexibility and comfort. The upper is made of breathable, supportive engineered mesh with built-in stretch. Cables give you a dynamic fit and help keep you secure during your workout. The multi-surface traction pattern is made for any workout surface and activity. The comfortable inner sleeve helps increase ankle support and provides a more seamless fit. They feature lace up fastening.