MOON Ideal Life Road and Mountain Bike MTB Helmet, Light Weight with High Grade EPS and PC Road and Mountain Bike MTB Helmet, Light Weight with High Grade EPS and PC Material: High grade Expandable Polystyrene (EPS) and Polycarbonate (PC); Certified by CE EN1078 and CPSC Size: Large: 58-61cm Medium: 55-58cm,having a weight of 230g and an adjustable screw to help with a precise fit Design: The design details consists of high grade double-sided velvet pads Additional Information: The high density EPS foam makes you feel more comfortable by generating cushioning effect. There are 25 air vents which allows enhanced air flow making riding cooler. The Snap-on visor for protection is removable making the helmet suitable for road and mountain bikes