Featuresr integrated in mold pc shell with 85gl density eps impact foamr 17 integrated vents seek for ample and good ventilationr fit adjustment back wheel 228 244 inches for comfort wearingr removable inner padding to absorb shock and sweatr breathable removable and soft chin guard and head protective paddingr detachable visor to add shade and magnetic glasses used in sun dayr specially designed for pedal cyclists skateboarders and roller skatersr note please do not apply it o