GlaRid lightweight helmet is designed for adults. Suggested age range: 14 years old and up, suggested head circumference: 21.6 to 24inch Adjustable Cycling Helmet. Full 360° Comfort featuring an adjustment dial and adjustable chin strap offers comfortable wearing and better fit better Bicycle helmet with Visors. Riding helmet visor can be detached or assembled to provide shade while riding, allowing you to reduce glare, improve visibility, and direct airflow Bike helmet for scientifically Designed. Lightweight and durable, with a 22-hole ventilation system to enhance the air circulation inside the helmet Distributed mesh thickened inner lining and head fully cushioned offers more comfortable to wear, and can be easily disassembled for cleaning