Best overall
For wind-driven snow, when sunglasses stop working
Smith I/O MAG Goggles
Spherical lens, magnetic lens swap, two lenses included
The only thing that works in a whiteout on a pass, and the second lens covers flat light — for most teahouse trekkers this is an expensive item that never leaves the duffel.
Seals against spindrift where glasses do not
Lens swap works with gloves on
Second low-light lens genuinely used on grey mornings
Expensive
Bulky and fragile in a pack
Fogs the moment you stop moving
Not for you if: Any standard teahouse trek. Take these for a peak climb or a winter crossing, and rent rather than buy if it is a one-off.
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