I have prescription sunglasses and my prescription is pretty thick, so my sunglasses already don't fold all the way and keeping them in a regular case ends up messing the arm and making it sit unevenly on my face. So I decided to go with a cloth case. These are very soft and while four of these seemed a bit much for me, I couldn't really beat the price and reviews. They seem decent quality and I will definitely be using these a lot, even for my regular glasses!