FEATURES Change Color Automatically Based on the Intensity of Sunlight Filter Reflected Light and Sunshine From the Surface of Water When Fishing Filter Strong Light Effectively to Cut Down Glare to Protect Eyes High Definition Lens Give You Clear Vision and Reduce Fatigue Durable Materials to Make Sure Can be Used for a Long Time Block Some Dusts & Wind to Improve Safety When Outdoor Activities ATTENTION BEFORE YOU BUY! The Photochromic lenses only change color under strong sunlight, and may not change very obviously under weak light circumstance.People all have different and subjective feelings about visual sense, some people may not sensitive to the color change of the photochromic lensesIf you have any problem after purchase, please feel free to tell usSome windshields&window glasses can block some sunlight, thus lenses may not change Suitable for Many Occasions e.g. Driving Through Tunnels When you driving into tunnels, the lenses which turn dark under the sun outside will turn light gradually, this can help you see clear in the tunnels. While regular sunglasses which have deep dark lenses may be too dark for you to see clear under the tunnels. The photochromic sunglasses can be safer than regular sunglasses under this circumstance. Premium Photochromic Lenses Comfortable Adjustable Nose Pads Durable Non-Slip Temple Lightweight Frame for Long Time Wearing Some Windshields Can Block Sunlight Already Thus Lenses May Not Change Dry Anti-Fog Cloth Popular Style Bifocal Glasses Designed for Children Value Four-Piece Set Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 3.7 out of 5 stars 16,173 4.3 out of 5 stars 16,841 3.9 out of 5 stars 1,372 4.3 out of 5 stars 154 4.4 out of 5 stars 14,154 Price $3.95$3.95 $14.95$14.95 $26.95$26.95 $9.99$9.99 $15.95$15.95 Anti-fog ✓ no data no data no data no data Blue Light Blocking no data ✓ ✓ ✓ ✓ Anti Eyestrain no data ✓ ✓ ✓ ✓ Anti Sunlight no data ✓ ✓ ✓ ✓ Frame Material no data TR90 TR90 TR90 TR90 Lens Material no data Resin Resin Resin Resin Multi Magnification no data ✓ ✓ ✓ ✓ Weight 7.5g 10.5g 11.0g 9.5g 16.44g