All Estero lenses are polarized, block 100% UVA/UVB/UV400 wavelengths and pass the FDA basic impact test.
Amber: Non Mirrored, Amber, 15% VLT, Base 4 Curve CR39 lenses
Forest: Non mirrored, Green tint, 11% VLT, Base 4 curve CR39 lenses
Slate: Non-Mirrored, Grey tint, 10% VLT, Base 4 curve CR39 lenses