mine folds flat but will not fit in my storage box or and storage places in the trailer. I keep it in the living space in the trailer. I like to keep as little stuff stored in the living area as possible but my chair and my outdoor mat will not fit anywhere else. I bought a very large outdoor mat - should have bought one a little smaller then it wold have fit in a hatch or storage box. My Weber grill, camp fire in a can, and small cooler go in my Highlander.
I got my mat at camping world they had several sizes and many colors the plastic woven ones wear like iron and are pretty in expensive also very light and water goes right through them. You can get them lots of places lots of variety on line.