Having a partner who snores like a trooper, and a puppy who ate my last set of cheap and perfectly effective foam earplugs, sent me on a quest to find replacements. I found these by accident in a very well known department store in London. At £6 for a pair I foolishly assumed they would at least make an effort to block out noise.
Sure enough, than night my partner started snoring so I reached for the cute little case and popped them in. "What the hell?" I thought, had I actually put thm in or were they tangled in my hair! I could still hear absolutely everything.I tried again, yet could still hear my cat purring on the floor! I even tried replacing the little yellow inner bits wih the white ones even though it sad the yellow ones for blocking snoring. Not only did it not help, I'm pretty sure it gave me superhero quality hearing.
Do not buy these if you want to block out noise. On the other hand if you want to be able to hear someone sneezing 3 towns over, these are the plugs for you.