Not effective or comfortable
I expected these to be more effective than they are. Regular foam plugs work better than these. The ones with plastic grips don't work at all and are too uncomfortable to sleep in. They helped a bit for my husband doing some construction, but I couldn't stand them and the only way they helped is if I put them in and then put my hand over my ears. Not useful for sleep! I would have returned but since I had to put in my ears to test, I am stuck with them for hygiene reasons, but NOT IMPRESSED. I will stick with the plan old foam ones.
Rating: 3 stars