Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: Are these self inflating?  If not, what kind of pump does it use?
Document: I got this air pad for ease of use. I was looking for an air mattress to use for camping, but trying to decide on one was such a pain. I was looking for something that could easily inflate without needing some sort of outlet to pump the mattress. It was very difficult to find something of good quality and affordable that inflated on it's own. I decided to take a look at the thinner self inflatable pads and based on reviews, decided to go with this one.
As with all of the "self-inflating" air mattresses it is best to give them a little boost the first few times you use them. Also, don't forget to store them open NOT rolled up. Finally, to reduce the size in your pack you can can fold this in half before rolling. It is not the lightest pad (if you are going for ultralight Alps also has one of those) but I think this is worth the extra pound or so.
Up until my recent purchase of this self-inflating pad, I've slept on a traditional dense foam sleeping pad. What a difference! I unrolled this pad and blew it up a bit and let it sit over night. Threw it on top of the ALPS Mountaineering Lightweight Cot I just got from Amazon and this combo is seriously comfortable! Construction of the pad and accompanying stuff sack are solid and I look forward to getting good use out of my new gear.
It does what it says, works fine. It does self inflate and packing is kind of easy. Just as someone pointed out, it doesn't inflate a lot of air, but it's enough to separate you from the cold ground. Overall it's worth buying
This matt is good for backpack hiking as it does not require an extra pump. It is however not necessarily that small and light when rolled up. I blew air into it as the normal self-inflation was not sufficient to give you a good 2&#34; padding.I  also feel that it is not wide enough and I ordered the LONG version. We camped in a tent and my wife ordered the $20 queen size Coleman blow-up mattress.
Several of us bought these to use on a trip on the Amazon in Peru. When I first unrolled it, I did not believe it would be comfortable. But It was. I slept very good on it and you don't need a pump to fill it up. I suggest the you blow 3 or 4 good breaths into the valve before closing. That plumps it up a little more and makes it even more comfortable.
It is really not that self inflating as advertised. I am disappointed with its marginal comfort margin, I guess that's what you get when you go lightweight. Expected better.
The camp pad is nice! After letting it self inflate, the wife and I like to release a little bit more air from the pad before sleeping. Just from self inflating, it is really firm so no extra inflating is nice!
My son suggested blowing it up a little. I did and the pads expanded nicely. I did that again the third night I slept on one of them.Summary: nice pads but might need a little help to go along with the self-inflating.
This is a wonderful product. The self-inflating foam works great. It is very light and doesn't take up much room at all. Make your backpacking experience a lot more comfortable without having to sacrifice too much. Easy to roll up and put back into the bag it comes with. Fits perfectly in my 1 person REI rent.
Answer: yes