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What do you put inside your tent to make your feet warm and also add padding? Standard rugs would hold a lot of water in the case of a leak, and they're too heavy/bulky. I was thinking one of those picnic rugs with one side being PVE that fold up with velcro, but they don't offer much padding at all.
This is for car camping, so don't mind space/heft, but a straight-up rug seems like overkill.