That expert isn't me. I used to be a fairly good skier, but since my amputation, my skiing days are over. So I had these googles sent to my friend, Dr. Domokos Hadnagy, who has degrees in engineering and a Ph.D. in Physics. He is also a registered ski instructor and has been skiing since he was a little boy in Europe. He knows his stuff and his review speaks for itself. For the record, Domo skied at Winter Park, Colorado for this review.
I received these goggles in a box that contained a carrying case for the goggles themselves, as well as a spare clear lens. Everything was packaged very carefully in a plastic bag, as well as a protective cloth bag over the clear lens and the goggles. The lenses themselves had a clear plastic film, which protected them from being scratched. This film had to be removed before using the goggles.
The instructions in the box gave details on how to remove the strap as well as how to replace the lenses. The colored lens I used for skiing was very effective in cutting down the light from a very bright bluebird day that I went skiing on. I was frankly surprised at how comfortable the lenses were with regard to the bright light available. I wear prescription glasses and the Goggles were a little too small to allow for my normal Eyeglasses to be used, they impinged on the goggles.
I had a pair of different normal eyeglasses, which were slightly smaller and fit very comfortably within the cavity of the ski goggles. The goggles fit very comfortably over my helmet and onto my face.
I wore the goggles for the full day skiing and at the end of the day, my eyes were not tired due to squinting because of the bright light. The lenses never fogged up and at the end of the day, I carefully placed them Back into the cloth bag that came with the goggles and then put them back into the convenient carrying case which would protect them very securely.
Needless to say, I was very pleased with the goggles