This product is made of fine quality material and reinforced PC sheet, with strong impact resistance, aging resistance, not easy to scratch. Features: Integrated molding, using stamping technology, the helmet has high density and is not easily broken by impact, preventing secondary damage caused by splashing. Lightweight material, the helmet weighs approximately 460g and does not bother movement. Multi directional heat dissipation vents design with 8 holes for breathability, reducing cold wind infiltration according to the direction of windflow during movement, while avoiding freezing during heat dissipation. Dark colored lenses can reduce the intensity of sunlight reflected on snow, improving safety. Adjustable HeadCircumference, fixed helmet without displacement by rotating adjustment button, suitable for more HeadCircumference, ensuring nice comfort and safety for the wearer. Comfortable chin pad, skin friendly and warmth, comfortable and soft. Removable ear protectors protect the ears from frostbite and can be removed when not needed. Specifications: Color: yellow, blue, orange, black, white (optional) Size: M, L (optional) Material: PC+EPS Suitable HeadCircumference: M: 550-580mm L: 580-610mm Package size: 281 * 231 * 221mm / 11.1 * 9.1 * 8.7in Package weight: 700g / 1.5lb Packing List: 1 * Helmet