Trivex lenses a certain material that lenses are made of. Lens material is usually broken into a few categories such as: CR-39, Polycarbonate, Trivex, and Hi-Index. Each one has it's perks and cons. Trivex is a highly rated impact resistant, lightweight and UV protected lens. It also has a higher abbe value compared to polycarbonate meaning the light moves through the lens a little cleaner making the vision more crisp and clear.