PROTECTED ALL AROUND With the AirDrop, ABUS offers its first full-face helmet that provides the best protection even for your most daring jumps. Enduro racers, downhillers, E-MTB riders and alpine adventurers are always pushing the limits of mountain biking. Increased protection used to mean heavy, hot and claustrophobic full-face helmets. New technologies like our EVA collarbone protector inserts, breakaway visor attachments and side communication channels bring real benefits to bike parks and the backcountry. If gravity is the thrill you need, the AirDrop is the MTB helmet for you. Features In-mould manufacturing for a durable connection to the outer shell with shock-absorbing helmet material (EPS) Zoom Ace FF: Adjustment system to fit the head circumference Collarbone protection edges QUIN ready - easy upgrade with the separately available QUIN chip Breakaway visor bolts MIPS: Impact protection that protects the brain, especially when the cyclist's head hits the ground at an angle during a fall. Ambiant Sound Channels (ASC) increase spatial awareness Breathable cheek pad inserts Design suitable for spectacles Double D-ring buckle system Ventilation: excellent ventilation through 11 air inlets and 6 air outlets Helmet size guide Measure your head circumference and use the measurements below for this helmet model. Head circumference Size Head circumference L/XL 58–62 cm S/M 52–58 cm