Are self-inflatable sleeping pads more slippery than other mats?
I was camping recently and someone was complaining that they were finding it hard to sleep, as their new self inflating mat was much more slippery than their old foam one.
Is this a real effect, and why does it occur?
Is it a general feature of self-inflating mats vs foam, the particular design, a factor of age, or are they just imagining things?
To be fair we were camped on a fair slope, but no one else had this problem (or at least didn't complain about it).
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I think the reason for this difference in slipperiness is purely a factor of surface material. Most foam pads have a tacky surface finish. Inflatable pads, on the other hand, usually have a sturdy synthetic fabric as the surface. Fabric on fabric (sleeping bag on inflatable pad) will stick less than fabric on foam, unless the fabrics have been treated somehow.
This is a legitimate effect to notice. I'm sure that somewhere on the internet you can find a coated inflatable sleeping pad, however the gain of friction on your pad will then come at the cost of additional weight.
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I think it's not the material or fabric on the top it's more the shape of the pad.
The most self inflatable pads are fully flat and even on top. The most other pads aren't flat because they have chambers. This gives a uneven surface of the pad.
So my conclusion is: You have less friction with the inflatable flat pad because of the surface structure, even with the same top fabric.
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At the risk of sounding like a grumpy old person it seems like EVERYTHING is slipperier than it used to be. I'm not sure if new stuff starts slippery and gets less so, or if things are now made more slippery. But I have bought a new tent, new sleeping pad and new sleeping bags this year and between them - I had better set up on 100& level ground. I used the sleeping bag as an underpad on a cottage bed this weekend, fully unzipped, and have never moved around so much in a bed as I did on this sleeping bag's interior surface.
I suspect that the same chemistry that makes a fabric lightweight and soft (so it can fold very small) while still strong also makes it slippery (think plastic compared to cardboard.)
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