The venting system to keep both your glasses and the lenses on this goggles depends on movement of air which is greater when downhill sking but not so predictable when alpine sking.
Very easy to exchange lenses however the goggles were too large for my wife when using a ski helmet. The goggles forced the helmet to be pushed up high on her forehead. The same thing occurred with my adult daughters helmets.
My husband and son got jeaous of my new lightweight and stylish goggles. The strap is easy to adjust and fits my face well after bending and stretching it a few times. I have already used it for biking and hopefully will soon use it for snow trip in the California mountains.
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