Best overall
Category 4 lenses for a day spent on snow
Julbo Explorer 2.0
Category 4, full side and nose shields
The right glasses for Island Peak or a snowbound pass, and the wrong glasses for everything either side of it — Category 4 is too dark to walk into a lodge or read a map in shade.
Category 4 is the only lens that handles high-altitude snow glare
Full shields, no gaps at the temple
Tough enough to live loose in a pack lid
Too dark for ordinary trekking days
Not legal for driving in some countries, which surprises people
Steams up when you stop climbing
Not for you if: A teahouse trek. If your route never crosses a glacier or a long snow slope, Category 3 with side shields is enough and far more usable.
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