Excellent Ventilation System Our bicycle helmet is based on wind tunnel ventilation system, professional aerodynamics and ventilation structure, with 18 ventilation slots. This can reduce the resistance when riding, and make the air flow through the bike helmet, which is comfortable and breathable.Comfortable Lining The helmet lining is well made, covering a large area, with better texture, and is more firmly integrated into the interior of the helmet. It can improve the comfort of wearing at ordinary times and produce cushioning effect when the head is hit. The lining can be removed and cleaned, so there is no need to worry about dust and sweat.Detachable Sun VisorOur cycle helmets are equipped with detachable long sun visors, which can resist ultraviolet rays, protect eyes from sunlight, and effectively prevent foreign bodies from flying into the eyes of cyclists. It is an ideal accessory for riders who like road bikes or mountain bikes and can be removed if not needed.Strong Protective HelmetOur bicycle helmet is made of high density imported PC & amp; foam material, which can ensure your safety and provide better protection when riding, thus greatly reducing the impact.Adjustable Head Cirumference & Quick Release BuckleBicycle helmet can be used in different head sizes, with adjustment knob, head circumference and side belt can be adjusted. This riding helmet is suitable for men and women with a head circumference of 22.4-24.4 inches (57-62 cm). Quick release buckles make it easy to put on or take off your helmet.Specification:Scope of application: adult helmets for men / womenSize:L/average size: head circumference 57-62cm / 22.4-24.4in, head width 18.5cm / 7.3in, head length 23cm / 9.1inMaterial: EPS foam +PC sheetWind tunnel: 18 air holesWeight: 220 gColor: Black, Yellow and BlackPackage included:1 X Cycling Helmet"All Products From Us Have Undergone Strict Quality Checks. if There Is Any Quality Problem Or You Are Not Satisfied With The Product contact Us. we Will Give You The Best Solution."