I honestly didn’t think that these things would work, but they were cheap enough to give them a try and they came with a lot of pairs and three different types. I put the ones that kinda of shape the back of your ears. They slid right on. It was a little weird putting my glasses on with them on. I smudge them a few times trying to get my glasses on my face and behind my ears. It is also taking a little while to find a good adjustment. To tighten glasses to your fave you just push them one way or the other… They hold my glasses on my face and I don’t have to worry about them slipping anymore. I love them!!! I was a little worried the ones I chose to use might look like a hearing aid, but they work so well I don’t care. There’s nothing wrong with wearing hearing aids, they are amazing devices…