I purchased this on Amazon. I haven't used it much, but it's been stored at home. As you can see in photos 4 and 9, it seems to have been developed with a focus on materials, etc. It seems like you can use it not only to protect your eyes when using smartphones, etc. for a long time, but also as part of your fashion coordination because it's simple ♫ I plan to list this for a short period, so if you like it, please make your purchase soon ^_^