POC’s DO Half Blade lenses use tints that are specifically designed for use on the road increasing the levels of contrast on the road surface which makes it easier to spot flaws & irregularities so you have more time to react. Anti-fog & ripel treatments are employed to help keep the lenses clear & make water simply bead off keeping your view of the road ahead clearer. Note: these are only compatible with the DO Half Blade glasses not the DO Blade. Please check before ordering.LENS SPECSTint: Black Lens: Zeiss Activity Specific Tint: Road Light Conditions: Very Sunny Lens Treatment: Ripel Anti-fog VLT %: 10%VLT Category: 3 Tint: violet (Original lens) Lens: Zeiss Activity Specific Tint: Road Light Conditions: Alround Lens Treatment: Ripel Anti-fog VLT %: 28.4%VLT Category: 2 Tint: Clear Lens: Zeiss Activity Specific Tint: Road Light Conditions: Low visibility Lens Treatment: Ripel Anti-fog VLT %: 90%VLT Category: 0