1. SAFE AND RELIABLE Trusted CEUKCA dual certification. The children's helmet uses advanced technology to firmly combine a sturdy PC shell with impactresistant EPS (expanded polystyrene), making the helmet safer and more stable. The 200g lightweight bicycle helmet for children will not strain their heads when riding. Thickened, soft, heatsealed lining and chin pad effectively protect the child's head from abrasions. 2. COOL VISOR The removable visor protects children's eyes from direct sunlight and their facial skin from scratches by branches without blocking their view, ensuring safety while riding. 3. AVAILABLE CHILDREN'S SIZES The children's bicycle helmet size: 4855 cm, suitable for boys and girls aged 311 years. For a fit, measure the circumference of the head, starting from the middle of the forehead to ensure the right size is chosen. By turning the dial on the back, you can adjust the size to the most suitable position to match the head shape. 4. VENTILATION 18 vents create a air circulation system for this bike helmet for girls and boys, helping to reduce air resistance during multisports and keeping the head cool and comfortable at all times. The inside of the children's bicycle helmet features removable and washable sponge pads for easy cleaning and reinstallation.