one-piece ultra-light men and women riding road bike mountain bike bicycle helmet

adopt one-piece molding process, uniform force is not easy to break, effectively protect the safety of riders.the one-piece helmet has good toughness and better protection of the head. breathable, low wind-yin design: the breathable roar can help the head sweat and dry quickly, refreshing and not stuffy, and reducing wind and cloud, making riding more enjoyable. lightweight eps foam, weighing only 210 grams. head circumference adjustment system: red plastic joint, retractable about 11cm, to meet most head circumferences, one-handed 360-degree adjustment. comfort lining breathable and sweat-wicking: removable comfort lining for easy cleaning and keeping your head fresh.