The excellent Cycling MTB / Road Bike Safety Bicycle Helmet with 18 Holesis highly recommended for each cyclist and outdoor activities enthusiast here. Made of high quality PVC shell and high-density EPS foam shell￡? it will provide best protection for your head during cycling and other sport activities. With adjustable rotary internal regulator design for a more flexible use and nice look￡? you can adjust the tightness of head circumference size flexibility according to your demand. Moreover￡? the specially designed 18 smart vents make airflow quickly￡? help you to keep a cool head on the road. Excellent product!                                    Features            New and high quality cycling helmetPVC shell and high-density EPS foam shellWith adjustable rotary internal regulator￡? adjusts the tightness of head circumference size flexibilityForm a unique and beautiful￡? diverse style of fashionLightweight and comfortable to wear18 front and rear wind vents make airflow quickly - High air permeability performanceProvide best protection for your head during cycling and other sport activities                                                            Specifications            Material    Plastic And Foam    <br>Color    White    <br>Hole    18    <br>Dimensions    10.62 x 8.66 x 5.51 " / 27 x 22 x 14 cm ( L x W x H )    <br>Weight    7.3 oz / 207 g    <br>                                                            Package Includes            1 x Bicycle Helmet<br>