Sleeping bags are not supported in The Sims 4. However, Outdoor Retreat does have two portable single beds and one portable double bed that your Sims can keep in their inventories.
If you’re doing the Rags to Riches challenge, having a portable bed will come in handy.
At the very beginning of the challenge, your Sim won’t have a place of their own to sleep.
Having a portable bed is much more convenient than sleeping on park benches.
If you want your Sims to be able to sleep on the floor, you can get the “Snug As A Slug Functional Sleeping Bag” CC object created by PickyPikachu.
Unfortunately, this CC object hasn’t been updated for a long time. It may not be compatible with your current game version but you can give it a try.
If you don’t like the idea of using mods and CC or the “Snug As A Slug Functional Sleeping Bag” is broken, you can go camping.
The alternative: Grab a tent and go camping
Get Outdoor Retreat, visit the Campground neighborhood in Granite Falls, and find the right spot to place your tent. The pine-filled air of Granite Falls will help your Sims make an escape from their busy everyday lives.
If your Sim has the Survivalist or Loves Outdoors traits, they’ll love spending time outdoors and sleeping in the open.
Well, if they’re squeamish about insects, they may get a little uncomfortable.
By the way, with Outdoor Retreat, you get campfires you can cook on and your Sim can catch fish or beetles and roast them too.
If it gets too cold during the night, you can also light up a bonfire.
I hope your Sim enjoys spending time outdoors.
Happy Simming!