Ewin E02 Polarized Sports Sunglasses with 4 Interchangeable Lenses for Men Women Golf Baseball Volleyball Fishing Cycling Driving Running Glasses 30 Day Money Back Guarantee, 24-Month Warranty and Friendly Customer Service. Customers can return and get refunded in case the purchasing is not satisfactory for any reason. To take advantage of the 24-month warranty on the frame or lens, you can feel free to contact EWIN Customer Service by detailing your order number and the problem you come across. All the lens are 100% UV400 protection coating, blocks 100% harmful UVA & UVB rays. Restore true color, eliminate reflected light and scattered light and protect your eyes perfectly. Only the main black lens is polarized lenses against strong sunlight, the other 4 lens are colored sunglasses for different environmental condition. Black TAC polarized lens: 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. The glasses lanyard has comfortable polyester braided cord, long lasting and fashion. Adjustable toggle on cords ensures that straps will not easily fall off. The lightweight polyester thin-frame sunglass retainers with rubber grips are great for sports, outdoor activities and everyday use. It can be carried on your neck when your hands are full of goods. Lightweight design is ideal for usage by golf, baseball, volleyball, fishing, cycling, motorcycling, skiing, riding, driving, racing, running, climbing, hiking, traveling, trekking or other outdoor activities enthusiasts. Fashion and stylish design, with rich color combinations of frames and lens. Polycarbonate lens and frames are impact, scratch resistant, durable and unbreakable.