Abus AirDrop MIPS Helmet - Polar White Small/MediumAbus AirDrop MIPS Helmet Polar White Small Medium. 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. The ABUS AirDrop MIPS by contrast features ASTM certified DH safety levels with exceptional ventilation and trail friendly weight. New technologies like the EVA collarbone protector inserts breakaway visor