In camping, a ground pad, sleeping pad, sleeping mat or roll mat is a simple device often used in conjunction with a sleeping bag. Its purpose is to provide padding and thermal insulation. All types currently available use air as their primary form of insulation

Inflating Types

Main article: Air mattress

Manually Inflated

Closely related to the air mattress a pad of this type requires an external pressure source to inflate, typically in the form of a pump or by blowing orally. Convection of the air inside the mattress reduces the amount of insulation it provides and more complicated mattresses include methods to reduce this by either partitioning the internal cavities, or by filling the cavities with material to trap the air such as down feathers or synthetic insulation.

An example of a 183x51x3.8cm self-inflating mattress, made from diamond ripstop. The black high volume valve can be seen in the left foreground.

Self Inflating

An extension on the conventional manually inflated mattress, this type is capable of self-inflation due to the open-cell foam that fills the internal cavity. For many years this design was protected by various patents held by Cascade Designs and they were an unusual and premium item. But since these patents expired many other manufacturers are now producing this type of mattress and they are now commonplace. These mattresses are lightweight and pack to a small size, which make them popular amongst hikers and campers. A standard size is 183x51X3.8cm and weighs around 700g, and packs to 28x16cm.

From Wikipedia under the GNU Free Documentation License
Sat Jul 24 17:02:07 2010

What is the best lightweight sleeping pad to use for a 2 week backpacking trip?
Q. I am going to Philmont Scout Ranch this summer for a backpacking trip and I need to buy a new sleeping pad. What is an inexpensive lightweight sleeping pad that is compact that I should use?
Asked by bschultz1122 - Sun Mar 7 15:07:54 2010 - - 3 Answers - 0 Comments

A. The Z-Lite is the most common sleeping pad used at Philmont. It is better than nothing, but it is not the most comfortable of the most compact. The Z-Lite will work for Philmont.
Answered by Tdawg - Mon Mar 8 18:33:00 2010

Will sleeping on a heating pad hurt an unborn embryo?
Q. I am 4 weeks 6 days pregnant and I have been sleeping on a heating pad the last few nights because I've had lower back pain and some crampy feelings. I read the too much heat at an early stage in pregnancy can caues birth defects in the baby. Is this true?
Asked by ladybug - Thu Jan 4 15:53:13 2007 - - 9 Answers - 0 Comments

A. I HAD to use a heating pad for the first two months of my pregnancy because I had such horrible back pain that I couldn't even get out of bed without help. Do not turn it up on high and don't fall asleep on it. I would sit in a chair before bed or during the day with the pad against my back set on medium or low just to get a little relief from the pain. But you really shouldn't be falling asleep on the heating pad. I used one a lot and my 10 month old daughter is perfect! My doctor never advised against using one. So I think you should be fine, just don't take the heating pad to bed with you.
Answered by .*AnNa*. - Thu Jan 4 16:17:58 2007

Sleeping pad that monitors movement....?
Q. Has anyone purchased one of these sleeping pads that alarm if there is no movement for a given amount of time or do you know of someone who has? If so, was it worth it? That's great!! My first son had sleep apnea, so with this one due next month, I think I will need some kind of monitor, or I will never sleep! Too bad these weren't invented earlier because they might actually save lives.
Asked by * - Mon Sep 8 21:29:47 2008 - - 3 Answers - 0 Comments

A. yes. they are called angel care kits i got peaceful night sleep. it has gone off twice since i had it. as she forgot to breathe but was ok. its the best invention in the world. worth its weight in gold. if u panic about their breathing. by all means get it u will sleep so much better...shes 10 months old now. u use them til they are out of a cot.
Answered by chef ramsay is HOT! - Mon Sep 8 21:33:27 2008

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