These sleeves are comfortable and easily stretch over frames. They've seemed to fix my problem where it feels like my frames are too sharp on one side and irritate my ear. The unfortunate part, in my opinion, is that the anti-slip silicone feel of these also irritates when it rubs. These sleeves generally prevent the glasses from slipping on their own but when I have to move them, the silicone isn't very comfortable when rubbing against my ear (too much friction).
Rating: [4 of 5 Stars!]