These are too noisy putting in. They are plastic and easy enough to place in the Calmers. However, when putting them into your ears, they occupy the space I usually press at a little to get the Calmers in. With these filters in, that gets even harder, because you Calmer is no longer flexible. Pressing down on these filters, it's just so noisy, I don't want to keep touching them, but I have to, to get them in and maybe press them back into place from time to time. Not the best feeling for sound-sensitives.
Also, my ears are big babies and every earplug hurts, except for the regular Calmers. So to be fair, I got these against better judgement. They make your Calmer no longer be flexible and hollow, so there is no more forming to your ears. My ears can't handle that. If your ears can handle other types of earplugs, honestly, you'll probably not have this problem.