Seems if you scroll around shopping websites and look at the negative reviews you always see people saying things like “never worked at all” or “stopped working soon after”.
It can’t really be that involved to line a small enclosure with some metal fibers, can it?
You can buy fabric that has metal threads, which works like a faraday cage and put it in a sock or whatever. TitanRF for example.
If you want a diy and cheap option.
I got like a whole square foot for 10 or 20$ years ago and it works like a charm.