Bicycle Helmet with built-in Rechargeable Taillight

This helmet not just protect the head but also gives warning from the vehicles behind you with the built-in rechargeable taillight. Features: Built-in rechargeable taillight with 9 different brightness, strobe, and fade modes to keep you safe wherever and whenever you are riding Dial fit adjusts to any fit in the medium size range for ultimate comfort and safety 19 vents will keep you cool and comfortable throughout the summer Removeable visor included for optional sun protection SIZE MEDIUM : 22-23 1/4 inch crown : 56-59cm