LEDIVO Adult Bike Helmet with Rear Light, Cycling Helmet CPSC Certified for Urban Commuter Adjustable for Men/Women

VENTILATION: The streamline air vents allow fresh air go through the biking helmet and over your head fast, help increase the speed and stay cool, bring your riding to next level.
COMFORT：Snug breathable helmet pads help absorbing sweat, keep your head stay dry during urban commuting, bikes cycling, bicycle traveling, bike racing, or any bicycle activities.
DURABLE HELMET: From outer advanced PC shell material to inner high-density EPS foam, together for outstanding shock reducing and absorption, offering you tremendous protection.
REAR LIGHT: Our bicycle helmet include rear LED light to provide the highest and best possible protection and visibility on the city roads, 3 warning light modes for selection, USB fully charged in just 2 hours.
ADJUSTABLE HELMET SIZE: Spin dial on the back of helmet and chin straps can be adjustable according to your head circumference. M size helmet circumference is from 21.65 to 22.83 Inches (55 – 58cm).