Michael V said:

Cymek said:

Arts said:

bit like the bed of nails

Yes
I have a Shatki Mat this is hundreds of plastic spikes that you lie on.
Takes a few minutes were its uncomfortable but after that is actually quite restful.

Interesting. Never heard of these before.

It’s helpful for a sore back and tension.
My physiotherapist recommended one.

https://www.shaktimats.com.au/

I bought mine from here.