Queen size air mattress on metal frame with internal pump. Frame unfolds and mattress inflates simultaneously, sits off the ground about 8 inches. I bought it online in 2018, you can google to find details EZ Bed Self Inflating. It's a great mattress that I've been using on my sleeping porch during the summer. It has a small hole that I tried to mend with a bicycle patch and it didn't work. This will require a pvc vinyl patch kit, at this point it will not hold air. I'm switching out to a regular mattress so I'm giving it away rather than fixing it. It works great and is very comfortable, especially in the summer heat. It folds up into a case with rollers. Other than the hole in the mattress, it's in good condition (the case has wear and tear).