A friend recommended it and its great.

fit flush in your ear so nothing is sticking into your swim cap ... love these

Since I started swimming 3 years ago, I've tried a half dozen or so different styles.  The moldable silicone ones worked the best at sealing water out, but I like these better because you don't have to mold them before insertion.

I love these ear plugs, u don't even know they are in your ear!
I use them with the Water Gear Neoprene Ear Wraps. I was getting recurring ear infections from doing water aerobics, this is a great solution!  Keeps my inner ears dry! Highly recommend these ear plugs!

Easy  and comfortable to insert in your ear.  Stay put, and insulate efficiently from water.
Way superior to any ear plugs I could find in pharmacy, which were either uncomfortable, inefficient, or got lost immediately in the water.

These plugs seem to work just fine.  The are a little firmer than most, so easier to put in your ears and keep the water out.  I like these better than the last plugs I tried.