At just 850 grams the bell sanction full face mtb helmet 2017 is a low profile full face mountain bike helmet aimed at dirt shredders and bmx riders who donrsquot need the more robust full 9 or transfer 9 the sanction has become the choice of adults who want full face protection but prefer a smaller size and profile if yoursquore riding a chairlift go with a full 9 or transfer 9 but if yoursquore pedaling bmx or dirt jumps this helmet