I've probably bought 15 or more pairs of these sleep masks. They don't last forever, they do start to delaminate after a while, and the elastic strap will stretch out (Which, you can tighten it if necessary), but that's all to be expected. Each pair lasts me several months, and they're so inexpensive, it's no big deal to buy another one. The best part about them is because of how they're contoured, they barely move when I'm sleeping, and I don't get any pressure on my eyes that other masks might cause. This is the only sleep mask I'll buy.