Leatt Iriz Lens Purple 30% Big Heavy Boulders Stacked Stones Stock Photo 1157573206 Shutterstock. Clear and Ultra Contrast lenses are made from 2. 7mm bulletproof material with an anti scratch coating and are dual pane meaning permanent anti fog. All lenses fit all goggles, whether they are Tear Off or Roll Off. Available in different mirror colours with various levels of Visible Light Transmission percentages (VLT). Features: Bulletproof. 2. 7mm thick optically correct lens. Iriz mirror coating Permanent anti fog function built into the inner lens polymer. Tear off and roll off ready with posts. VLT (Visible Light Transmission): 30% Dual layer polymer lens provides permanent anti fog functionality.