Helpful , Reusable.
I wear ear plugs to sleep nightly.  That being said I got tired of throwing them away nearly daily.  These are better than I had hoped.  They fit well without expanding your ear canal.  It works like a very small plunger forming a seal in your ear.  I've found two small issues .  The small ' handle '  used to take it in and out of your ear is too long while laying down.  I had to trim it a little.  That did not change the way the string fits however.  Also you need to check the baffles for sharp edges before first use,  I found a small burr on one of mine that was poking my ear canal.
Rating: 4 stars