Don't block out a lot, but great for salsa dancing
I go salsa dancing a lot and used to hear a pounding sound in my ears for up to an hour after leaving. These help. They don't block out a lot of sound (not sure how they'd do at a rock concert), but they allow me to still hear the music, they are very discreet, and they don't fall out when dancing. The canister makes them easy for me to keep on my key chain.
Rating: 5 stars