Size (head circumference): 1 size (54-62cm )(21.26 -24.41 Inch )
Weight: 40 0g
Type: Ultralight and integrated molded helmet
Air holes: 10-12
Material: PC + EPS
Durable material, shock collision proof, 10 vents to keep your head dry, removable comfort velvet lining provides warm, light and high safety.