I use them every time I shoot they have not failed when came bbs backfired. Glass lens are pretty good but tend to fog a little but only for two hr use. I would like to know where the strap to the back of the glasses fit exactly because they fell off. Hope to have UVA lenses for the sun glare. No scratches on them and saved my eyeball. They fit on the up side have to rearrange the fit a littl bit. They need harder composite plastic from Dupont Vespel forward engineering is what I recommend. Also glasses are a little average. Thanks UmarexUSA.com
