The TK1 series is an affordable alternative for providing comfort, protection, and style. The TK1 features fully adjustable 5-position ratchet action temples with extendable length. Other features include a wraparound design and a one-piece polycarbonate lens with integral side shields. The lightweight frame provides added comfort and balance. The TK110AF has MCR Safety's UV-AF® anti-fog coated lens that is eco-friendly and UV-cured, providing 3 times greater anti-fog performance than generic anti-fog safety glasses. The polycarbonate lens filters out 99.9 percent of UV radiation that could be harmful to the eyes.