Bicycle Adjustable Men Women MTB Mountain Bike Riding Mountain Road Bike Integrally Molded Cycling with 21 Vent

Bicycle Adjustable Adult Men Women Mountain MTB Bike Cycling 21 Vents Safety Feature:Adjustable size: the head circumference is 55-62cm, the head width is 18cm or le, if the head is too large or too small, then this will not fit, please choose another style;This has a brim.Specification:Main material: EPS + PCProduct color: Red, Blue, Yellow, WhitePackage size: about 260x215x115mm/10.24*8.46*4.53inNet weight: About 200gApplicable age: AdultNumber of ventilation hole: 21Note:Although the brim will play a role of shading, we still advise not to install the brim for riding, because there have been cases where wrestling and falling, and the brim of the hat is broken and stuin the eyes; In order to protect our safety as far as poible, we should not wear the brim for riding.Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-3cm measuring deviation due to manual measurement.1 X Bicycle