I have created a fin that sits on top of my helmet, which can be used to advertise a team name or some type of slogan. Last year I noticed a lot of riders with team names and slogans on their shirts, as well as many riders who had something attached to their helmets. The helmet fin attaches at the front and back of the helmet with stong peel and stick supports, is made of lightweight plastic, sits around 3 inches high, and goes from the front to the back. My name "Cancer Warrior" is what I have on my fin where I used peel and stick letters and spray paint that can be used on plastic. Most helmets have a similar shape, so if you are interested in this for your helmet, send me an email. I will not charge money for it, only a donation to my ride. Please let me know. If you want me to send you a picture, send me an email.