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): 70% Dual-layer polymer lens provides permanent anti-fog functionality.