Every Quetha sunglass model meets strict safety standards and offers a 100% ultraviolet protection against direct sunlight.
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| FILTER CATEGORY | TINT | USE | LUMINOUS TRANSMITTANCE RANGE |
| 0 | Clear/Very Light | No reduction in glare | 80-100% |
| 1 | Light | Cloudy | 43-80% |
| 2 | Medium | Regular | 18-43% |
| 3 | Dark | Sunny |
8-18% |
| 4 | Very Dark | Extreme Glare |
3-8% |
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