Replacement Integrated Over Moulded Anti Mist Anti Scratch KN Lens for EVO®VISTAlens® Helmet. When fitted to the EVO®VISTAlens® Helmet this replacement lens has the following features and benefits: optical Class 1 - High optical quality with no optical distortion; K Rated - Anti-Scratch resistance to surface damage from fine particles; N Rated - Anti-Mist resistance to fogging; UV 2C-1.2 2: UV filter (EN170) provides protection from harmful UV. C: Unimpaired colour perception. 1.2: High light transmission; the safety lens offers B-rated impact protection - tested with 6mm steel ball bearing at speeds of up to 270mph (435kph).