1. Cool and lightweight cycling helmet: This bicycle helmet is designed with 24 ventilation holes, which can effectively reduce air resistance and keep you feeling cool while cycling. This cycling helmet weighs only 310 grams (0.68 pounds) and won't cause any burden on your head during the ride. 2. Impact resistance: This bicycle helmet is made of a high - density PC shell and EPS foam. The durable hard shell and soft padding can disperse the pressure caused by external impacts. This bicycle helmet will make you feel comfortable and protect you in all directions. 3. Magnetic helmet goggles and visor: This bicycle helmet comes with a visor and goggles, suitable for both mountain biking and road cycling. You can wear the goggles and visor to not only protect your eyes from sunlight but also protect your face from sand and wind. 4. Adjustable size: This bicycle helmet is suitable for both adult men and women. You can adjust the size of the helmet with one hand. 5. Suitable scenarios: Cycling 6. Head circumference: 56 - 61 cm 7. Name 1: Road bicycle helmet 8. Name 2: Mountain bicycle helmet 9. Name 3: Men's bicycle helmet 10. Name 4: Lightweight bicycle helmet 11. Name 5: Bicycle helmet 12. Name 6: Road bicycle helmet 13. Color: Black 14. Material: PC + EPS 15. Dimensions: 28.5 x 16 cm 16. Package contents: - 1 bicycle helmet Only the above package contents are included, and no other products are included. 17. Precautions: Light reflection and different displays may cause a slight difference between the color of the item in the picture and the actual product. The measurement error is allowed to be +/- 1 - 3 cm.