PHOTOCHROMIC Safety glasses: The lens will changes with the the intensity of the ultraviolet light, the stronger UV light , the darken lens. Once you get into the indoor, the lens will return to transparent status. UV400 protection coating, blocks 100% harmful UVA & UVB Rays to protect your eye well. These protective glasses have blue light blocking effects to provide better visibility. you can always see a clear image blue light blocking glasses can cut harmful Reduce eyestrain and headache. Improving safety, comfort Polarized and Mirror Coating Lens- Offer 100% UVA&UVB Protection Restore true color, eliminate reflected light and scattered light and protect eyes perfectly. ANTI-BLUE LIGHT LENSES: block 90% of harmful blue light and relieve eye fatigue. • TR90 COMFORTABLE & LIGHTWEIGHT: The anti-skid nose pad and TR90 temple make the sunglasses fit more comfortable on the bridge of your nose and above the ears. great to wear for long periods of time. The strong & durable wraparound construction offers a high level of direct eye protection, whilst the side covers protect peripherals anti-scratch glasses lens can maintain clear vision anytime, anywhere, even if you wear myopia, hyperopia, sunglasses inside. Read more • PROFESSIONAL PROTECTION DESIGN: Safety glasses wrap around the glasses frame with transparent side panels. Provide excellent peripheral vision and protection. These safety glasses with protective goggles function can also prevent dust, pollen, and other particles, thus having a better protective effect. Read more