Here was my response:
I'm an expert female motorcycle roadracer with long hair (mid-back), so I spend a lot of time on the bike at high rates of speed. Just some feedback on your idea.
First, I spend on average about $500 on my helmets for riding and racing. I puchase a helmet about once every 2 years. The biggest thing I'm concerned about is safety, so I only purchase top-of-the line helmets. I'm currently racing with an AGV XR2. Your design requires a hole to be drilled in the helmet. My concern is how this compromises the safety of the helmet. The Snell and DOT tests that the helmets were certified to were performed with no hole in the helmet, so introducing the hole voids those certifications. Additionally, how does the user know that the drilling process doesn't introduce fractures in the shell, impact absorbing liner, and padding, compromising the performance of those materials in the event of a crash?
Second, my AGV Owner Instruction manual states under Section E of Information for Users : "No attachments should be made to the helmet except those recommended by the helmet manufacturer. Do not drill or cut the shell." Did you obtain such recommendations by each helmet manufacturer for your invention?
Third, after spending $500 on a helmet, I am turned off by the idea of drilling a hole in it.
Personally, I would not use this product. My concern above all else is safety, and drilling a huge hole in a helmet when the manufacturer advises against it just doesn't seem smart. Also, in the event of a crash, the hair can be ground off due to being trapped between the helmet and the pavement. A fellow female racer had this happen when wearing pigtails under her helmet. She crashed, and one pigtail was caught between the shoulder of her leathers and the pavement, grinding it off. This invention may add to that risk due to the location of the ponytail on the exterior of the helmet.