I really liked that! I bought them because I heard they were better for the environment and honestly they are so cute! I honestly don't know if charcoal will do anything, but I don't mind. I could smell it when I first took it out, but I flushed mine with peroxide before using and the smell was gone. They appear to be hard, but they are actually very soft. I prefer hard toothbrushes, so I definitely don't find them too soft, just in moderation. And assuming speed of movement means how it moves, I haven't done that yet. However, you get a mini box with 2 toothbrushes, so I assume you can take it with you without any problems.
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