Can we agree that 90% of regular BF contributors live somewhere in the USA? I find it interesting that so many studies based on data sets outside the U.S. are promulgated here in an attempt to validate any POV that is uppermost in the agenda of a poster. US helmet standards exceed those of Australia, Canada and Europe. US helmet adoption exceeds other developed countries. And? What? Notwithstanding our outsize love for all things helmet, US cyclist death, derangement, and dismemberment metrics still exceed (a bad thing) those in the rest of the developed world. If you are whacked by an F150 or an Escalade (vehicles that are rare, or do not exist in the rest of the developed world) you will suffer blunt force trauma to your torso that no helmet as yet devised can protect against. Being hit by a large American pickup truck or SUV is at least as likely as going over the handlebars in a panic stop. I wear a helmet. It is more than 12 years old. It's not even scratched. It is a handy place to affix a rear view mirror. I hope never to actually find out how it works for keeping me alive. I have WAY higher standards for 'quality of life' than most of my family and friends. They all want to survive an accident even if they are left drooling and/or lying in a vegetative state for the rest of their natural lives. Me? No. I would rather not make it in the event of an accident serious enough to deprive me of mobility, mental acuity, sight or any other vital sense. But that's me.