The Stage Stunt Photochromicgoggle lens automatically adjusts it tint to match light conditions, getting darker as conditions get sunnier and vice versa. The amber base tint adds definition to terrain no matter the light conditions. A distortion free spherical design prevents eye strain, and the permanent anti-fog treatment keeps the lens clear. One lens for all riding conditions: from bright sun, to overcast, to snowy days, to night riding. Triple layer foam provides a custom fit for any face, while sealing out drafts cruising down the slopes. An adjustable strap matches any head size and fits over a helmet. The spherical double pane lens provides crisp optics and wide field of view. Customize your look with Stage goggle straps (sold separately). VLT rating 20% to 60%.