I just bought new prescription glasses and sunglasses, but the store where I got them did not have clip-style cases in stock. So, I went searching for some and found these. The Able cases have a nice soft lining to protect the glasses plus they are big enough to accommodate my aviator-style sunglasses. I use the clip to hold the cases in my shirt pocket and have for years. I never thought about using it on the belt. The clip is fine in the pocket.