Polycarbonate lenses are impact-resistant, making them good options for those who work outside or do physical labor as they will withstand the elements. Trivex lenses also offer protection from UV rays and other harmful environmental factors such as wind, dust, and water so they're a great choice if you need polarized safety glasses for outdoor jobs like fishing. They're also lightweight, so they're often preferred by those who need polarized safety glasses for sports such as snowboarding.