The classicLeather side shields, unchanged since the 1950s
Julbo Vermont Classic
Still the reference for a reason, and the glass lens is optically better than anything plastic; it is also heavier, and the leather takes days to dry once soaked.

Julbo Explorer 2.0
Category 4, full side and nose shields
4.2 on Amazon (9 ratings)
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.
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Do not buy this 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.
Not every route needs it. These are the ones where our guides would put it on your list.
Everything else we recommend in glacier glasses, including the ones we think suit a different trekker.
The classicJulbo Vermont Classic
Still the reference for a reason, and the glass lens is optically better than anything plastic; it is also heavier, and the leather takes days to dry once soaked.