The roadhawk ff is lightweight and responsive thanks to the full flytefoam midsole constructed using groundbreaking midsole foam the flytefoam is 55 lighter than the industry standard its organic fibres bounce the roadhawk ff back into its original shape to provide perfect cushioning from the start of your run to the finish the half monosock design make it easy to slip the shoe on and off while the combination of breathable mesh upper and ortholite sockliner ensure a cool healthy environm