This is the "air mattress". The problem is that the plugs for the holes to put in air are missing. There should be one for the mattress part and one for the pillow. Without those plugs the mattress is useless. If you think that you can fix a solution you are welcome to have this too for the trip. Using the yellow mat plus the air mattress is really nice, and keep most of the cold from the ground away.
What do you think? You can't spend a lot of time on the trip before the test you have on Monday..... Also, you can't glue the hole, you need to take out the "plug" after wards otherwise you can't take the mattress home