These are great for black plastic frames that are slipping down/ sitting too low. They are 2 mm thick so they will position your glasses higher on your face, if that's what you're looking for. The side of the pads will show but, with black frames, they blend in easily. The pads are a bit long for my glasses but they can be trimmed. The adhesive seems pretty good- I elected to change them after 2 weeks and they didn't seem close to falling off.
