Specification: Brand: ROCKBROS Material: PC + EPS Weight: 260g, 278g 4 colours available: silver, black, red, white 2 sizes available: M (55-58 cm), L (58-61 cm) The helmet is essential for your safety while riding. Thanks to the aerodynamic design, you won't feel stuffy and hot while riding. Rare adjuster：Our bike helmet comes with a rare regulator. The adjuster makes it easy to adjust the tightness and better fit the helmet to your head. Ventilation：The helmet has vents to maintain comfort while riding and reduce wind resistance. Liner padding：The padding covers a large area that is comfortable to wear and can better protect your head. Removable and washable. Safety standard：CPSC safety standard and CE certified. The high-quality bicycle helmet from ROCK BROS protects your head well if you have had a small fall from your bike.