https://www.amazon.com/KIWI-design-Integrated-Anti-Scratch-Scratching/dp/B094CZ9RJ1 these are the best. They have a well designed shape that matches the curvature of glasses. And they're made from high quality materials that are strong, but also easy to removed and won't scratch glasses. But, depending on how thin your facial interface is you might need a thicker glasses spacer like this one https://us.vrcover.com/products/xl-spacer-for-oculus%E2%84%A2-quest-2. I needed the xl spacer with my vr cover fitness facial interface, but with the stock quest 2 facial interface, the stock spacer there was enough room for the kiwi ring protectors.