4 Colors Lightweight Aero Helmet For Women/Men Brand:WEST BIKING Material:PC Shell + EPS Foam Weight:269g Size:27.5*15.5cm Head circumference:M 55-57cm/L 58-61cm Color:Black,White,Pink,Light Brown Vents:14 air vents for optimal ventilation and comfort Usage:Perfect for MTB bike,road bike,skateboard,scooter,roller skate, etc Features:269g ultra-light weight/Removable LED Taillight/Double logo design/Free adjustment head circumference/Stable and durable/Soft inner pad Note:There are seperate helmets and helmet with taillight sets for sale. Please carefully compare the pictures to choose what you need. If you have any questions, please feel free to contact us for consultation. Removable LED Helmet Rear Lights Battery Capacity:300mAh Lumens:80 Lumens Type-C Rechargeable:1.5-2 Hours Three Lighting Modes: Flash About 12 Hours Slow Flash About 15 Hours Always On about 6 Hours