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Restore true color, clarity is high, transmittance is better, service life is longer, hardness is higher It blocks 99-100% of both UVA and UVB harmful radiation.Make your eyes more comfortable and you can see better Improve contrast and visual clarity.Reduce eyestrain, no tired eyes after a full day in the sun.Reduce reflections and glare (esp important for those with sensitive eyes or post surgury recovery)Protect your eyes against harmful UV rays, minimizing damage to your eyesight in the long run.2018 latest brand design, suitable for any face shape, showing your unique high-end taste. Suitable for yachting, driving, running, fishing, horse racing, skiing and mountain climbing, hiking and business or other outdoor enthusiasts 30-day refund guarantee - all customers of merry enjoy a 30-day refund guarantee. If shopping is not satisfied for any reason, the customer may return or exchange it.You have no risk to try, we will provide you with the best service!