(This seems to be more important, so I changed the order of product reviews.) + Added a method of removing air using a pump. (No matter how much I read the manual, I had a hard time understanding it.) 1. Take out the built-in air pump. 2. Remove the black part of the rubber stopper next to the tube where air is inserted. The hole comes out in two stages, and like a regular tube, the one that comes out sharply is in the first stage (for putting air in), and if you look at the other side, there is another cover that is black and comes out. Subtract that. (I was really lost here.) 3. Insert a funnel into the part where the built-in pump turns on and off, and insert it into hole number 2. 4. When the built-in pump is turned on, air flows out. 5. When it falls out, the sound of it falling out changes. At that time, turn off the pump, close the hole, and fold it well. (I will add photos when I have time.) I bought it to use when my parents or guests come home. I saw a post about slow delivery, so I inquired about a product that could be shipped right away and purchased it right away, and it took about a week to receive it. (It doesn't matter if it's just the size single) I tried using it over the weekend after fully charging the pump. Even if you put a lot of air in it, it will come out slightly when you use it. (It's the same principle as a tube.. haha) I used it by running the air pump from time to time and filling it quickly. I don't have a picture, but I used it with a pad on top and it was good. It's just difficult to live on top as a sofa. Not only will you lose air, but if you sit just a little bit wrong, your back will hurt. The purpose is to use it by filling and removing air, but if you plan to keep it open all the time, you may want to consider that you will need to run the pump at least once a day. There is a slight noise when filling with air. (Come to think of it, I haven't taken it out yet... Since it fills up easily, it should be easy to take it out.)

The delivery was so, so late, so I had to spend more money to buy a different mat in a hurry. I have to put it back in frequently to see if it's leaking. Pichu

Delivery was late, but it is truly the best product.