1 features and advantages. Lens Width: 49 mm 2. Inspired frame design --3. Ergonomic construction and lightweight design - 4.100% protection against harmful UVA / UVB rays 5. HD vision, clear details, the package did not include a missing attractions glasses a microfiber cleaning cloth a hard protective case, how should I care glasses? 1. No paper towel or cloth, grinding dust and fibers which may enter the lens and leave scratches. 2. Avoid using household cleaners or soap, they are strong enough to slowly disintegrate lens coating. 3. Be careful seawater corrosion, avoiding the lower windshield of the car, the same ultra-high temperature exposure.