Moon Specialized Road Mountain Bike Helmet with LED Lamp Light Material: High grade Expandable Polystyrene (EPS) and Polycarbonate (PC); Certified by CE EN1078 strengthen by carbon fiber Appearance: Having a general outlook of a model resembling the head of a python and a basic background pattern of snake scales in a uniform transformation Size and Weight: Large; 58cm - 61cm, 22.83" - 24.02" having a weight of 230g and an adjustable screw to help with a precise fit Additional Information: The high density EPS foam makes you feel more comfortable by generating cushioning effect. There are 31 air vents which allows enhanced air flow making riding cooler and there is an LED lamp at the rear. The Snap-on visor for protection is removable making the helmet suitable for road and mountain bikes