Lily Park Modern Fashion Full Metal Crossbar Technologic Flat Lens Aviator Sunglasses polarized TAC POLARIZED LENS- 100% UV400 protection coating, blocks 100% harmful UVA & UVB Rays. Restore true color, eliminate reflected light and scattered light and protect eyes perfectly. TAC lens includes 7 layers. The 1st layer is polarization layer. The 2nd and 3rd layers are adhesive layers to enable durability. The 4th and 5th layers are UV protection layers to absorb UV light. The 6th and 7th layers are shatterproof layers. PRODUCTS DIMENSION-Lens height:50 mm (1.97 inches); Lens width:62mm (2.44 inches); Leg length:145mm(5.71 inches); nose bridge:25 mm ( 0.98 inches); frame length:148 mm (5.83 inches) SUPERLIGHT, STYLISH, DURABLE- Lightweight design is ideal for usage by motorcycle and cycling bicycle, driving, running, fishing, racing, skiing, climbing, trekking or other outdoor activities enthusiasts. Polycarbonate lens and Metal frames are impact, scratch resistant, durable and unbreakable LIFETIME BREAKAGE WARRANTY ON FRAME & LENS - Frames and lens are unbreakable for no risk purchasing. In case any broken problem happens, contact the seller of Lily Park without hesitation to solve the problem until satisfaction. Duduma provides lifetime after sale service for all Duduma products. 30 DAY MONEY BACK GUARANTEE- All Lily Park customers enjoy 30 Day Money Back Guarantee. Customers can return and get refunded in case the purchasing is not satisfactory for any reason.