kufun Road Bike Helmet Bicycle Adult Unisex Cycling Adjustable (Blue)

[Material] Styrofoam + PC [Size] Head circumference: 55-62cm You can adjust the dial to fit the size of your head. The helmet is super lightweight, weighing only 200g. No burden on the head, easy to ride a bike. [Excellent breathability] Designed with 18 ventilation holes, hot air inside the helmet can be efficiently expelled. A basic model for adults, with great cost performance. In-mold molding