While the Full-9 helmet is designed for big days on the mountain, think chairlifts and alpine peaks, the Sanction Helmet is perfect for BMX, dirt jumps and slightly less fearsome downhill trails. At just 850 grams it's not going to weigh you down and the low profile full face design still has the full coverage you need to instil confidence, but a sleeker look and feel. The ABS shell provides burly protection, easily up to the demands of off-road use and should you take a stack then you know you're covered. Keeping you cool, the Sanction gets 15 vents, letting fresh air circulate and humidity to escape, leaving you able to concentrate on fast lines, not a sweaty brow. And as a final flourish, you get an adjustable visor too. Everything you need from a full face mountain bike helmet is here but in a more compact package.