I needed something to protect my ears from exploding, since I'm not the kindest of drummers.. 
I bought this ear protector and now I know that my ears are safe.. 
It's very comfortable to wear and you can fit your earphones inside to play with a metronome or over songs etc.. 
It blocks all frequencies almost evenly, maybe a bit less my toms' freqs but it's not even a big of a deal.. 
The only possible drawback for me is that the metal handles are a bit thin, but if you use them with care, I don't think you'll ever have an issue.. 
So, if you're like me and you want to save your ears from going extinct, I suggest you buy it...