Matress Pro

A mate of mine who has been keen on coming along on some walks just sent this over to me and asked if I knew anything about these mattresses. I'd seen them pop up as ads on social media before and fairly quickly dismissed them as I usually do with most ads of this nature. Having a look at the site, the claims are fairly big. R-value of 4.2, and 500g. They claim it packs up small (22cm long cylinder). I'm skeptical, but wonder if anyone here has given one of these a try.
https://www.westhikers.co/products/mattress-pro
https://www.westhikers.co/products/mattress-pro