The OPSIN delivers an extremely large field of view with minimal distortion, giving supreme visual confidence to every skier and rider. This medium fit cylindrical lens goggle fits perfectly with any of POC's helmets. The Clarity lens by Zeiss is optimized for everyday use with a VLT of 22% so you can see in a wide variety of light conditions. POC's anti-scratch and anti-fog treatments should be enough to seal the deal on the OPSIN.