Core Since '54. The Custom 500 Carbon is the epitome of classic Bell protection, with genuine stitched leather interior that's wrapped in a carbon composite shell. The ultimate in a high-end 3/4 helmet from the brand that started it all. The Custom 500 is the epitome of a classic 3/4 helmet. With five 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 carbon 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. Low-profile carbon composite shell. Five shell and EPS liner sizes ensure a low profile look. Multi-density EPS liner. Custom suede interior liner.