Replacement Integrated Anti Mist Anti Scratch KN Shield for EVO®VISTAshield® Helmet When fitted to the EVO®VISTAshield® Helmet this replacement shield 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 A - Impact Rating. High energy impact » 6mm, 0.86g ball travelling at 425mph (685kph) UV 2C-1.2 2: UV filter (EN170) provides protection from harmful UV. C: Unimpaired colour perception. 1.2: High light transmission.