For ENLEE Bicycle Helmet Breathable Shockproof MTB Road Bike Safety Aero Helmet Feature: 1. Reflective harness compilation, more safety details, we added reflective material to the harness compilation, so that you ride more safely at night. 2. The helmet shape fits the head better, and the local force will be dispersed during the impact to absorb the impact energy in a balanced way,which improves the safety of the brain! 3. Ventilation is one of the key factors affecting the balance of a helmet. This helmet dissipates heat efficiently, and the rear vent layout is even more effective. 4. The EPS liner is optimized to be lighter in weight while maintaining safety, and the optimized foam liner is breathable with a smooth, low-friction layer for a comfortable ride. Specification: Color(Optional):Pink, Black, Blue, White, Gray Helmet size: 27.5*21*15cm Suitable for head circumference: 58-61cm Package Includes: 1*Bicycle Helmet Note: Please allow 1-3mm error due to manual measurement. Please make sure you don't mind before ordering. Please allow 1-3g weight error. Please make sure you don't mind before ordering. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual colour of the real item. Please make sure you don't mind before ordering, thank you!