Well in the 80's living in Maryland I did not wear a helmet and went down doing a wheelie estimated speed 60 plus this was at a three day party. No major I injuries. So to my point I have worn a helmet since the event. In addition on the freeways in Southern California I wear a full face do to road debris and a consistent cruising speed of 75 to 80.
I got my strap fixed today, guess I will start wearing it again