I have been working with earplugs for over 12-13 years and they are the worst I have ever used. I bought more than 10-15 pieces and I barely have 3-4 left now after 6 months. I bought others at almost the same price and so far, for 2 months, they are top-notch in terms of sound and durability. I hope I helped and I have no bias against this particular brand/company.

I use them at work when the compressor is running and they greatly reduce the noise. They mainly reduce the penetrating sounds that pierce your ears. Very good for their price. They didn't get the 5th star because the headband is a bit small in height and I have to adjust it back a little to fit well!

I use them when I work with wheels, saws, chainsaws, etc. They do the job and for their price, they are (simply) good. There are definitely better ones out there, but these are value for money

Lightweight earmuffs, good sound isolation (tested on tree trunk splitting with a wedge, axe, and chainsaw)

First of all, I would like to point out that for its price, it has very good performance (it is also logical to appear to be made entirely of plastic). It isolates external sounds by quite a few dB. The material that comes into contact with the head is soft and does not bother. The length of the headband is adjustable. A review update will follow after testing it in a work environment (agricultural tractor).

Much better than I expected for the 6.85€ I paid, no doubt. I used it with a palm sander. However, it presses, so if you have a big head, it might bother you.

Very good for their price (10€)
I use them for a chainsaw and a grass trimmer.

Update after a few months! They still work fine and they are durable, but they put a lot of pressure on my head since they are made for small to medium-sized heads. I heated up the plastic of the strap with a heat gun and brought it to where it should be