The age to stop wearing a helmet is when you are dead! And wearing a helmet while you ride will prolong that inevitable outcome of life. Things have changed significantly to the point where those who don't wear helmets are the rookies taking stupid chances. Two years ago I got airborne, crashed and slid 25 feet on concrete, feeling my helmet hit the pavement at least 5 times. Not sure I would be writing (or even thinking) this if I was not wearing the helmet. A sign in a bike shop once read, "If you have a $10 head buy a $10 helmet." Extrapolate that thought: if you don't value your brain or your looks, don't wear one. I hope you do. Wear one and ride safe. Brain injury is PERMANENT.