Core Since '54 The Custom 500 is the epitome of a classic 3/4 helmet. With 5 shell sizes the Custom 500 is sure to give the rider a personalized fit regardless of where you are on the size chart. The quilted, contrast-stitched, plush interior is wrapped in a fiberglass composite shell. Fit and finish are impeccable, and with dozens of shield and visor accessories available, the opportunity to personalize yours is endless. Experience the best in category helmets from those who helped invent truly protective helmets.