i had a single dome swag thrown in with some other gear I bought recently.
The brand name is wild country.
It has no mattress. I was impressed by its weight relatively and size , can get two hands around it rolled up touching fingers and thumbs without anything inside , it has canvas top and mossie net and the black base made of something (strong waterproof) else.
These days we have good quality light or ultralight inflatable mattresses.
We also have really light and pack down small sleeping bags.
The swag takes the place of tarp (if need be) , groundsheet , tent , mossie net etc . Or the like. Which then makes the added weight less.
And can be worn old style slung behind the back ,horseshoe over the shoulder , horseshoe over a pack or as I'm playing with , added to a webbing harness setup.
It can sit around the hips like a belt strapped above the other pouches , or go in the other mentioned manners also with the h harness.
It's another one of those pieces of gear I acquired which I didn't appreciate until I had it.
It could probably out last most other options long term , and is pretty luxurious in the right weather.
Came minus the hoop poles , however can easily be tied up off the face and added makeshift stick spreaders , poles etc.