The Nike Free Metcon 6 is designed to support your workout, made with more forefoot flexibility. The heel is reinforced with extra foam. The outsole is laser-siped for better flexibility. Foam in the forefoot and midsole offer cushioning. The upper is made of breathable, supportive engineered mesh. Flywire cables give you 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.