Joysun Unisex Polarized LensCovers Sunglasses Wear Over Prescription Glasses 9011 TR90 frame TAC lens polarized Lens width: 60 millimeters Lens height: 42 millimeters Bridge: 18 millimeters Arm: 140 millimeters Composite Frame + Polarized Lenses Joysun sunglasses with polarized lenses allow in the vertical component of light, which is preferred for clear vision, while eliminating the easily scattered and skewed horizontal component of light. However, regular non-polarized sun lenses indiscriminately filter all light whether it is horizontal or vertical. Glare is dampened, but not eliminated Joysun sunglasses with polarized sunglasses are beneficial for driving by reducing those bright reflections of the sun on the cars ahead. Polarizing lenses will provide higher definition vision for driving, remove dazzling effects and reduce eye fatigue. Joysun sunglasses are designed with fully floatable and 99% glare-free. Joysun sunglasses come with 100% UVA and UVB protection (up to 400nm), and bifocal options are available. Hydrophobic and oleophobic coatings repel salt residue, fingerprints and oils, leaving you with crystal clear perspective regardless of the conditions. The frame is made of TR90, which is durability, flexibility and comfort. A new innovation in the eyewear using thermoplastic material in a frame; these particular eyeglasses offer extreme comfort because of their flexibility quality. They can easily bend accordingly to your face texture and is resilient for ground impacts.