I picked up four of these for less than $30 total thinking they would be great for camping.  They are basically heavy duty pool floats.  I would not count on blowing these up using your own lungs unless you have an hour to spare and don't mind passing out.  They inflated easily enough with an electric pump but you must have an adapter that will work with the "pool float" valve.  I took a bicycle pump camping and even with that it took ten minutes of steady work to inflate one mattress.  Deflating them is equally difficult because of the valve.  These are big enough to sleep on unless you are huge but I don't think they are comfortable.  I did not sleep well on this and had a lot of sore spots when I got up.  I let a it of air out halfway through the night to make it less firm but that didn't help much.  I wound up cutting them with scissors and tossing them just so I wouldn't have to spend an hour deflating them.  I've got one left over, I'll use it as a pool float in the summer and spend more money on nicer camping mattresses.