Safety Adjustable Bicycle Bike Adult Helmet Cycling Road Carbon Visor Mountain for Mens Women Boys Unisex 1pcs This section easy to wear helmets, the fashion, while focusing on safety! The comfortable cushion lining High-sided article black velvet earthquake, earthquake effect of increasing. Vents is to improve the helmet inside air flow, take part of heat. Form a unique and beautiful, diverse styles of fashion, hole design more reasonable, more ventilation is suitable,more comfortable With adjustable rotary internal regulator, adjust the tightness of head circumference size flexibility.Equipped with the front brim. The front panel, more glossy Handsome and elegant helmet, Strong, Crashworthiness, Breakage-proof with high withstand strength. Strong foam density. 21 air holes, Size can be adjusted. Wind tunnel,Duct design, effectively reduce wind resistance. Internal structure: high-quality foam layer, with regulating torsional, can adjust the size of head circumference. Size: All in one size L. Suitable for head circumference under 58-61 cm and wide under 16 cm. This section easy to wear helmets, the fashion, while focusing on safety! The comfortable cushion lining High-sided article black velvet earthquake, earthquake effect of increasing. Vents is to improve the helmet inside air flow, take part of heat. white, Yellow, Blue 3 Colors. weight:175g. size about:27*21*14cm. Duct design, effectively reduce wind resistance; Strong foam density Breakage-proof with high withstand strength, Size can be adjusted Suitable for head circumference under 65 cm and wide under 16 cm. Package Included1x Cycling Helmet