A bicycle helmet is a protective headgear designed to safeguard cyclists from potential head injuries in the event of accidents or falls while riding a bicycle. These helmets are an essential safety accessory for cyclists of all ages and experience levels.

In conclusion, a bicycle helmet is an essential safety accessory for anyone who rides a bicycle. It is designed with a combination of materials and features to protect the cyclist's head from injuries, while also offering comfort and ventilation for an enjoyable riding experience.