They are not effective, water seeps in slowly, so they do not serve their purpose of water protection. Also, the box states size M, something that neither the company nor the eshop I bought them from mentioned, nor do they provide any other size option. They are not worth the money they cost.

Perfect, I have them for 6 years! They are small and require attention. There is no need to put them inside. No water enters at all, 100% waterproof.

I have a mild form of otitis and I bought these specific earplugs for when I take a bath, shower, and so on. One thing I have to mention is that they don't do any job. I was hesitant because there are many different options available. As for the size, I didn't have any problem. It depends on the size of the ear that someone has. It simply lets water in, it doesn't protect you

I have been using it for more than three years. This is the second set. The first one simply loosened with use. It holds water perfectly, including saltwater. When used correctly, there were no extraction issues. Great product, worth the money.

It does the job it describes but they got lost in the pool the first week. They are tiny and there is nothing to keep them close to you (a string) when they come out. If they don't come out on their own, you may need a doctor to remove them. They are not practical at all in the end due to the difficulty of taking them out/putting them in and loose fit in the ear if you swim vigorously.

It keeps the water out of the ear, but it requires attention to the size. In my case, it got stuck quite deep in the ear and I had to go to the doctor to remove it. It would be useful if it had a string or something else that prevents deep insertion and allows for easy removal

It is truly the best for the sea. It solved the problem of water getting into the ears, I highly recommend it!