Category 4 · 3–8% light transmissionLight
Light
at its
worst
Fresh snow throws back most of the ultraviolet that lands on it, and every thousand metres of altitude adds more again. A dark lens is not the answer to that — a measured one is, with the gap at the side of your face closed.
4
Lens category, top of the scale
80%
Of UV fresh snow reflects back
The range
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Dark is
not the
same as
enough.
A lens category is a measurement, not a mood: 4 passes between 3 and 8 percent of visible light, which is the band glacier and high-altitude snow actually call for. The leather side shields matter as much — on ice, most of the light reaching your eyes arrives from below and beside you, where a frame has nothing in its way.
See the range