Gdog
Contributor
Interesting. Wonder how they work at depth with pressure on the outer ear, since they seal off? The proplugs have a tiny hole in the center to counter this. But these look intriguing.JBL offer a similar product called Hydro Seals. I have never used these, so cannot attest to their performance; but included a link to some user reviews.
One difference seems to be that this product apparently keeps the ear canal dry, so might be targeted more towards free diving and/or snorkeling applications. However, many people seem to love these for diving as well; might be another low-cost option to consider, particularly in a case where frequent ear infections are a problem.
I also have lost pairs of the plugs. For me the issue is loosing them between dives. I have never lost them in the water.