Filter categories:
0: 80-100% colorless or very lightly tinted/ very little sunlight
1: 43-80% lightly tinted/ weak sunlight
2: 18-43% medium tinted/ average sunlight
3: 8-18% dark tinted/ strong sunlight
4: 3-8% dark tinted/ very strong sunlight
All Ray-Ban glasses are supplied in the original case.