ROCKBROS one-piece mountain bike road breathable and breathable sports safety bicycle helmet

Feature:

• Use air cooling make the air free
• Ultralight/Anti-Sweat/Shock Resistance/Ventilation
• Brethable,Adjustable size,Magnetic-snap,easy to wear and take off

Specification:

• Brand Name: ROCKBROS
• Material: EPS
• Age Group: (Adults) Men
• Weight (g): 260g/278g
• Air Vents: 16 - 20
• Type: Integrally-molded Helmet
• Model Number: HC-58
• Fit for: MTB Road Cycling,Hiking,Camping Helmet
• Name: Cycling Men Women Out breathable Fashion Bike Helmet
• Material: Outside: PC, inside :EPS,Nylon adjust belt
• Helmet Size: About 26*21.5*15cm
• Fit for head size: S:55-58cm,M 58-61cm
• Color: Black,Red,White,Titanium,Gradient Red,Green,Blue

Measurement Method:

• Use a soft ruler to make a week around A and B. （Hair is also counted） And then you can purchase the helmet according to your needs.