Cycling helmets are protective headgear designed to reduce the risk of head injuries during bicycle accidents. They are typically made from a hard outer shell and an inner foam layer that absorbs impact. Proper fit and adjustment are crucial for effectiveness, ensuring the helmet stays securely in place while riding. Most cycling helmets come with features like ventilation holes for airflow and adjustable straps for comfort. They are available in various styles and sizes to accommodate different riders, including children and adults. Wearing a helmet is often recommended for safety, especially in areas with heavy traffic or challenging terrain.