Wiley X Slay Polarized Silver Flash Smoke Replacement Lenses ACSLAP Lenses block 100% of the sun's harmful UVA and UVB rays. Shatterproof Selenite polycarbonate lenses are made from one of the world's most impact resistant lens materials. Silver Flash (Smoke Grey) polarized lenses are multi-coat Z-Oxide mirror over smoke lenses. Reduces glare. Excellent on bright days.