Perfect polarized lenses -- Bircen polarized sunglasses have a uv rating of 400, which means they block 100% UVA UVB and UVC rays, without the haze and optical distortion of conventional polarized lenses. Polarized lenses optimize vision for maximum clarity. Bircen polarized sunglasses lense help reduce glare caused by reflected light and improve your vision and eye comfort. | Aluminum magnesium alloy makes the frame strong and light. Sunglasses are only a few dozen grams, and you can barely feel them on your face, but they're unbreakable. Suitable for motorcycle, bicycle, driving, running, hiking, walking,golf, fishing and other outdoor sports enthusiasts. | Spring-hinge: a pair of spring-hinge sunglasses will provide all the flexibility and practicality you want, and allow the sunglasses arm to extend beyond the traditional 30-degree range of motion when opening the sunglasses. Protect your glasses from bending or breaking for higher comfort. | Non-slip nose pad -- selected high-quality imported soft silicone material to prevent glasses from slipping during work or exercise. Ergonomic modeling, light and elastic, comfortable to wear. Relieve pain or discomfort. | 30 days no reason to refund service - all Bircen customers will receive a 30 day no reason refund service. If for some reason the purchase is not satisfactory, the customer can return the product and receive a refund. You have no risk of trying and will provide you with the best service!

Perfect polarized lenses -- Bircen polarized sunglasses have a uv rating of 400, which means they block 100% UVA UVB and UVC rays, without the haze and optical distortion of conventional polarized lenses. Polarized lenses optimize vision for maximum clarity. Bircen polarized sunglasses lense help reduce glare caused by reflected light and improve your vision and eye comfort. | Aluminum magnesium alloy makes the frame strong and light. Sunglasses are only a few dozen grams, and you can barely feel them on your face, but they're unbreakable. Suitable for motorcycle, bicycle, driving, running, hiking, walking,golf, fishing and other outdoor sports enthusiasts. | Spring-hinge: a pair of spring-hinge sunglasses will provide all the flexibility and practicality you want, and allow the sunglasses arm to extend beyond the traditional 30-degree range of motion when opening the sunglasses. Protect your glasses from bending or breaking for higher comfort. | Non-slip nose pad -- selected high-quality imported soft silicone material to prevent glasses from slipping during work or exercise. Ergonomic modeling, light and elastic, comfortable to wear. Relieve pain or discomfort. | 30-Day Money Back Guarantee - All BIRCEN customers receive a 30-day money back guarantee. If the purchase is not satisfactory for any reason, the customer can return the product and receive a refund. You have no risk of trying, we will provide you with the best service!