Very good. We used them on our 3-month-old baby at a wedding because the loud music was disturbing her and she was crying. As soon as we put on the earplugs, she calmed down and even fell asleep, while she was also comfortable sitting in our arms. Very good!!

It does what it is intended for. A bit difficult to open the lid (maybe it was just my case). I open it with a small knife because it doesn't open as it says.

I bought them for my 4-month-old baby because we were having a wedding baptism. They didn't work for us at all.. The baby finds it impossible to sleep with them as they can't lie on their side like all babies at this age. They are not exactly lightweight as a product for babies. The elastic, until you adjust it correctly, makes you sweat with the way it is made, and the baby constantly fusses.. As for sound insulation, obviously, I can't have an opinion, but I am not interested since it doesn't suit her to wear them. Wasted money

I bought them for my niece who is sensitive to sounds and they helped her a lot! She doesn't like them when she's awake, but they help her a lot to not wake up when she's sleeping. Also, they are very convenient to place as they are like a ribbon with Velcro and they fit easily.