I first used a Pro Grip Shield - I liked it and it worked well. I changed helmets and went to Fog City because it was all I could find on short notice and it just plain sucked. Tossed out the Fog City and the shield that it ruined and went back to the Pro Grip. It works just fine for defogging or, more specifically, not fogging, but its got a slight tint to it and between the two shields, optical clarity isn't the best. But it's better than nothing. Never tried the Pinlock and probably won't since the Pro-Grip works.