This Shark Pinlock Insert is for use on the Shark Race-R Pro / Race-R Pro GP / Race-R Pro Carbon Helmets.Clip between two adjustable eccentric pins in VisorInserts can be swapped depending on your riding needsMoisture absorbing plastic and the silicone sealInsulating air layer between Pinlock insert and visorWorlds number one anti-fog productThe Shark Pinlock Insert is extremely tough and durable and offers outstanding optical clarity.Pinlock is well known for it s patented anti-fog technology in the global market and is expanding. Pinlock offer 3 different performance levels in our range of insert lenses, to enable everyone to enjoy a clear and fog-free vision when riding. The insert lenses range starts from the Pinlock 30, Pinlock 70 and Pinlock 120 lenses. The number is used to describe the levels of fog free clearance the insert lenses provides in order to acclimatise to temperature differences that cause helmet shields to fog up.Pinlock anti-fog inserts clip between two adjustable