Interesting. I've only known of these types of things from V-moda, they are called Faders. The pros are that they are more affordable, you can pick different sizes, come in 3 colors and they can be attached with a string to keep them together. The same string can attach to the stylish case which is included so you can wear it around like a necklace. Also, depending on your location, they may be free to ship. The only con is that they don't offer any filters, so you are stuck with 12dB reduction. I have never own either the Faders nor the Ear ones, so I couldn't tell you which ones are better, but as a first time buyer, I might not go with these unless someone offers amazing arguments in their favor.