I have a couple of these and I take one on all my adventures. I also volunteer with search and rescue and we are required to carry one because of the multitude of different uses. I suppose it's original intended use is as a sleep pad. I have used it alone like that several times and it works as expected if you sleep on it alone. Now let's get into a few other common uses that I've found for it. Lay it out to kneel down in snow and dig through your bag and keep your knees off the cold ground, for a seat while taking g a snack break on the trail, for an extra insulating layer under an inflatable sleep pad, to protect your inflatable from punctures, i cut one up to add some extra padding on a pack once, i also cut pieces to make a padded belt for a home made sled once, I've also cut up an old one to make small sit pads. They are cheap and very useful not to mention super light weight. Just get one and throw it on your pack. You won't regret it.
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