Check that you know how to wear your bike helmet properly. When worn in the right way, a bike helmet can help protect you from a head injury. September is National Traumatic Brain Injury (TBI) Awareness Month. Wearing a helmet when you ride a bike is a key way to protect yourself from a TBI. Look for the Consumer Product Safety Committee (CPSC) sticker inside the helmet. That means it has been approved to give good protection against impact. When you have your helmet on and buckled, it should fit snugly on your head and not move around at all.