- ENHANCED DURABILITY: Crafted from thickened sheet material, this helmet offers superior impact resistance and shock absorption, making it ideal for both mountain and road biking. - IMPACT PROTECTION: Designed specifically for adult cyclists, the helmet features a robust PC shell paired with an EPS liner that effectively absorbs impact energy. The elongated rear shape provides comprehensive head protection, significantly reducing the risk of head injuries during falls. - EXCELLENT VENTILATION: Equipped with 14 strategically placed air vents, this helmet ensures optimal airflow, effectively removing excess heat to keep you cool on long rides. The lightweight design, combined with a breathable inner pad, enhances comfort throughout your cycling experience. - CUSTOMIZABLE FIT: Easily adjust the head circumference to fit various head sizes with the internal rotating adjuster. The dial system accommodates head sizes from 55 to 61 cm, ensuring a secure and comfortable fit for every rider. - VERSATILE USAGE: Whether you are tackling rugged mountain trails, commuting through the city, or enjoying a leisurely ride on a sunny day, this helmet provides the protection and comfort you need for all cycling adventures. - LIGHTWEIGHT AND COMFORTABLE: The use of lightweight materials ensures that you can ride for hours without feeling weighed down, while the breathable inner padding helps to wick away moisture and enhance comfort.