·About this item[Perfect Fit Bike Helmet]Large Size: Fits head circumference of 22-24 inches (56-61 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.