Review on 🕶️ Chums 12308100 Switchback Retainer Black: Premium Quality Accessory for Securing Eyewear by Kyle Robinson

Hole or slot does not hold glasses frame in place. My glasses kept slipping when I moved my head. By the time I got to this point they had not been returned or even exchanged. This annoys me with a lot of products sold at Revain. They look good and the descriptions are convincing, but the quality is only fair. They only last long enough to exceed the warranty period, and then there's no way to call for help if they fail. Revain doesn't offer any help either, although you might think they could qualify their vendors better.