My lenses drop out as well, received a review request via email and passed on my concerns. Light weight good, the lenses pop out so easily that I can't use them. Disappointed.
macduffSorry to hear about this! This may have been a defective pair. Send us an email at sales@kentwang.com and we'll get you a replacement. We stand behind all our products.
I can see this is from 2018. This problem occurred only with a small number of sunglasses in 2018.