Description: Quality materials: Crafted from quality PC shell and eps foam, this mountain bike helmet is designed to be sturdy, and breathable, ensuring it can withstand long term useComfortable fit: Featuring a removable soft liner and breathable design, this cycling helmet offers a comfortable wearing experience and is easy to cleanUser friendly design: Equipped with an adjustable head circumference knob, chin strap, and quick release buckle, this skating cap allows for easy adjustments to achieve the nice fitIdeal size: With dimensions of 32 cmx18 cmx16 cm/12.60 inchx7.09 inchx6.30 inch, this bicycle helmet fits head circumferences ranging from 57 cm/22.44 inch to 62 cm/24.41 inch. Its compact structure and lightweight design make it portable and an ideal gift for cycling enthusiastsVersatile use: The skating gear is great for outdoor cycling activities such as mountain biking and other similar sports scenarios, providing reliable protection in various environments Specification: Material: PC Shell and EPS Foam Size Chart: Helmet Size32cmx18cmx16cm/12.60inchx7.09inchx6.30inchHead Circumference 57cm/22.44inch to 62cm/24.41inch Package Includes: 1 Mountain Bike Helmet Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.