CAIRBULL Lightweight Bike Riding Protective Helmet Mountain Bicycle Helmet

features a removable sun visor, 22 air vents, an easy-to-turn dial, adjustable straps, and a moisture-wicking lining pad to give the riders a wonderful cycling experience. It is a great protective gear for anyone who loves bike riding, scooter, skating, and other sports.
Features:
In-mold polycarbonate shell with EPS liner for impact resistance and protection.
A removable sun visor shades your eyes from harmful sun rays.
22 air vents keep the rider's head cool and reduce helmet weight.
Easy-to-turn dial for size adjustment to suit 21.7 - 24.0 head circumference.
Adjustable side straps for customized fit; padded chin guard for added comfort.
The soft lining pad absorbs shock and wicks moisture away, and is removable and washable.