Good sound protection

I bought these headphones for my daughter 3ans1 / 2.
Well, she said she does not hear the music, she'll understand later that it is precisely to mitigate the noise ... But it confirms that it is doing its job!
Otherwise the report / quality / price is right. It's just that making the size of the ears is not super easy. We must draw a little with both hands on metal rods. I would have preferred a simpler system like the headphones with notches.
Otherwise it is fluorescent pink and fits perfectly on the head of a little girl.