The ABUS Airdrop helmet is a must-have for mountain bike riders who demand the best in protection, comfort, and style. With its lightweight and aerodynamic design, this helmet is perfect for high-speed rides on the toughest terrain. The helmet features the Zoom Ace turn-dial adjustment system to ensure a secure and comfortable fit. The Multi-directional Impact Protection System (MIPS) provides additional safety benefits by reducing rotational forces in the event of an impact. The ABUS Airdrop meets strict CPSC safety standards, so you can rest assured that you're getting a helmet that offers top-notch protection. With 11 vents for excellent ventilation and reduced wind noise, the Airdrop is the perfect choice for serious mountain bikers. Don't compromise on safety or performance - choose the ABUS Airdrop for your next off-road adventure.