With 14 ventilation holes to guarantee good breathability and decrease wind resistance, this bike helmet is easy to ride. Lightweight and comfortable, this bike helmet provides good head protection and reduces pressure on the head. The bicycle helmet is made of high-quality pc and eps material. The head circumference is 58-62cm. This bicycle helmet is suitable for outdoor cycling. Item Name: Bicycle Helmet Material: PC, EPS Features: Fast Heat Dissipation, Impact Resistant, High Strength Size Details: Head Circumference: 58cm-62cm/22.83"-24.41" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bicycle Helmet