For custom driver earpieces, you will need to first get an ear impression made of your ears. The ear impressions will be used to create the ear molds for the custom earpieces. To get impressions you can do one of the following:1. Visit your Dr. or Local Ears, Nose, and Throat, specialists. Mail the ear impressions to our Forest Park Location.2. Visit our Forest Park Location for a complimentary ear impression. (We are experienced in making impressions for both children and adults.)3. Visit our support trailer at an upcoming race for complimentary ear impression. (Please see event schedule for available times and locations)