The ROCKBROS ZK-013 is an ultralight cycling helmet designed for adult men, weighing approximately 252 grams. It features an integrally-molded structure with a PC shell and EPS foam for enhanced safety. The helmet includes a built-in taillight module with 8 LED lamp beads, offering three lighting modes—strong light, low light, and flash—to improve visibility during night rides. The taillight is powered by a 300mAh rechargeable lithium battery, providing up to 12 hours of usage in flash mode. With 13 ventilation holes, the helmet ensures adequate airflow to keep the rider's head cool and dry. It's suitable for head circumferences ranging from 55 to 60 cm and is available in multiple colors, including black, red, titanium, and white.