From power lifts to ladders, from grass blades to grainy platforms, from the turf to the track, the Nike Free Metcon 6 supports every grunt and growl. The brand added even more forefoot flexibility to its most adaptable trainer and reinforced the heel with extra foam. The laser-siped outsole offers better flexibility. The big-toe side of the forefoot is rounded for better agility and quickness when making sudden movements. There is more foam 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. Multi-surface traction pattern is made for any workout surface and activity. Comfortable inner sleeve increases ankle support and provides a more seamless fit. Lace up closure. They are athletic sneakers.