Description Product Description [Durable and impact-resistant material] This bicycle helmet is specially designed for adult and young riders. The use of tough and durable PVC and PC, EPS foam helps to absorb impact and protect the head in the event of a collision. [All-round breathable and lightweight] 18-hole ventilation design allows air to pass through and keep it cool. The breathable lightweight material is comfortable to wear. [Adjustable head circumference and quick release button] Adult bicycle helmets can be adapted to different head sizes. The head circumference and side straps can be adjusted. This cycling helmet is suitable for male and female head circumferences of 20.47-23.62 inches (size 52-60 cm). The quick release buckle design makes it easier to put on or take off the helmet. [Removable sun visor and inner lining] Use detachable sun visor to protect your eyes from sun, rain, and dirt. You can remove it when you don't need it. The inner pad absorbs sweat from the head and helps maintain ideal comfort. The mat is detachable, you can remove it from the mat for cleaning to ensure that your next ride is clean and cool. [Wide application] Suitable for cycling, mountaineering, skiing, roller skating, skateboarding and other sports. Our bicycle helmet is your good choice. They are both comfortable and safe. How to dress: Please make sure that the helmet is properly worn on your head: 1. Place the center of the buckle on both sides under the ear and adjust the length. 2. Always wear a helmet with a buckle under the chin and near the throat. Adjust the tightness of the shoulder strap and tighten or loosen it to make the shoulder strap tight and comfortable. 3. The helmet has an adjustable fixing system to keep the helmet in a positive position during riding. When adjustment is needed, turn on the system knob to tighten or loosen it clockwise. Specification: Material: PC+EPS Number of vents: 18 Helmet head circumference: 20.47-23.62 inches Product color: black and white, blue and white, blue and black, carbon black, black powder, red and black, black and yellow, red and white Package includes: 1 Bicycle helmet