Bike Helmet With Led Lights Bicycle Helmets Commuter Cycling Helmet Usb ?Perfect Fit Bike Helmet?Large Size: Fits head circumference of 22-24 inches (56-61 cm), Medium Size: Fits head circumference of 20.5-22.5 inches (52-58 cm), Small Size: Fits head circumference of 18.9-21.5 inches (48-55 cm). Designed for both men and women, helmet features an easy-to-adjust dial that allows for a customizable fit with just one hand, ensuring a secure fit without pulling your hair. ?Front and Rear LED Lighting System?Equipped with 5 white LEDs at the front and 13 red LEDs at the back, USB rechargeable. The white front LEDs illuminate the road ahead, while the red rear LEDs feature four lighting modes: fast flashing, slow flashing, warning flashing, and snake-shaped flashing. This ensures visibility to both vehicles and pedestrians, reducing the risk of accidents. ?Innovative Cycling and Skateboarding Helmet?Certified by CPSC, CE, and ASTM for safety, this helmet features a high-density durable outer shell and EPS foam interior, providing superior impact resistance. It offers comprehensive protection for urban commuting, cycling, and skateboarding, ensuring the best safety experience. ?Flexible Adaptive Adjustment Technology?Featuring an adjustable size design with an integrated adjuster to ensure a snug fit for cyclists. The rear adjustment knob combined with adjustable side straps allows riders to easily adjust, maintaining stability and safety even at high speeds. ?Comfortable and Breathable Wearing Experience?Designed with 20 optimized ventilation holes and airflow channels that combine air circulation with cooling channels. This provides a lasting comfortable experience even in hot weather, effectively keeping the head cool and suitable for prolonged wearing. ?Removable Washable Liner for Easy Maintenance?The liner is made of breathable mesh fabric, keeping you dry during rides. It is removable and washable for easy daily maintenance. Additionally, we promise excellent after-sales service for electronic products. If there are any issues with the lights, please feel free to contact us, and we will provide a suitable solution.