Ski and Snowboard Goggles

Go by light. Yellow or orange (60 to 90% transmission) for flat light, cloud and night. Rose or amber (30 to 60%) for partly cloudy, the everyday lens. Bronze or brown (15 to 30%) for bluebird days. Dark mirror (5 to 15%) for full sun at altitude. Most goggles now swap lenses so you can carry two.

Anti-fog on the night before, left to dry. Never wipe the inside of the lens; it strips the coating. Let it air-dry or dab with a goggle cloth. Keep the vents clear, don't push the goggles up on your forehead between runs, and make sure the helmet doesn't block the top vent.

With an insert that mounts inside the goggle, made for the exact model. Smith, Oakley and Bollé offer their own. The insert stops around -4.00 because of the curve; mountaineering sunglasses go further.

If you ski through trees, weather and from first lift to last, yes: the lens adjusts itself and you stop swapping. If you only ski sunny days, a fixed dark lens is cheaper.