Poc do half blade spare lenspocs do half blades lens tints are optimised for road biking increasing contrasts on the road surface and helping you to spot irregularities holes and gravel much sooner the anti fog and ripel treatments help keep fog dirt and grime off your lenses and makes water pearl off featuresactivity specific tint roadlens treatments ripel anti foglens type pc lens by carl zeiss visionplease note this spare lens is only compatible with do half blade and not do bl