Bicycle Helmet with Dual Shell Protection: CE (EN1078) and CPSC (1203) approved. The PC dual-shell integrated molding design enhances durability and provides superior impact protection. The high-density 20mm EPS foam effectively absorbs and disperses impact forces, ensuring reliable head protection. Lightweight and Comfortable Cycle Helmet Design: Featuring a rear elastic cord for easy hanging and quick removal of sports glasses. The high-quality moisture-wicking liner is lightweight, breathable, and can be easily removed and cleaned, ensuring a clean and cool riding experience. The bike helmet weighs only 335g/0.74 pounds, reducing head pressure even during extended wear. Sun Visor for Protection: Reinforced large sun visor is carefully designed to provide eye and impact protection, preventing mud, branches, or other debris from directly hitting the rider's eyes and forehead during cycling. The high-quality metal buckle ensures secure fastening without the need for tools. Adjustable and Secure Fit for Men and Women: One-handed adjustable dial knob and internal padding ensure a perfect fit for your head. The bike helmet accommodates various head sizes, suitable for most teenagers and adults. Recommended head circumference: 57-61CM (measure your head before purchasing). Versatile Outdoor Cycling Helmet: Specifically designed for various road and mountain biking activities, especially endurance and off-road riding. With the removable visor, it is suitable for commuting bikes in urban and suburban areas.