All HJC helmets that use HJ-05, 07 or 09 ratchet systems are Pinlock insert ready with the purchase of an optional Pinlock ready shield [FS - 15 Series helmets ship with a Pinlock ready shield installed]
Pinlock inserts are created out of moisture absorbing plastic. The silicone seal on the Pinlock creates an air tight double visor. These two features make Pinlock the best fog resistant system there is. You can keep your visor closed and see everything! [CL - 16 Series helmets ship with a Clear Pinlock insert.]