KleenGuard™ Personal Protective Equipment (PPE) enables rather than inhibits – allowing for maximum productivity and safety for you and your employees. With KleenGuard™ Nemesis™ Safety Glasses, you get sleek, modern eyewear with durable, lightweight construction. That is just one of the reason why millions of people wear them for protection both at work and at home. KleenGuard™ Nemesis™ Safety Glasses have polycarbonate lenses that provide 99.9% UVA/ UVB/UVC protection to help prevent eye damage like cataracts, retinal damage, and other conditions that can cause temporary vision loss.