Best for warmth for packed size
Therm-a-Rest NeoAir XLite NXT
The reference inflatable pad. More warmth per unit of packed volume than anything else here.
If this site had one pad to recommend, it would be this one, because it is the clearest expression of the packed-size criterion. The reflective internal structure delivers real cold-ground insulation without foam bulk, so it compresses to a volume that makes a serious pad possible in a small pack.
Two honest things. It is noisy -- the internal film crinkles when you move, and that is a well-documented and polarizing characteristic rather than a defect. And it is a thin-walled air pad, so punctures are the thing that will eventually happen; the patch kit is part of the purchase, not an accessory. Always inflate with the sack rather than your mouth, because moisture from breath is what grows mold inside a pad you cannot clean.
Specs
- Manufacturer-stated R-value in the four-season range
- Internal reflective layers rather than foam fill
- Packs to roughly water-bottle size
- Included inflation sack avoids breath moisture inside the pad
Good for
- Best warmth-to-packed-size ratio in the category, by a clear margin
- Thick enough that side sleepers do not bottom out
- The pump sack keeps your breath, and the mold it feeds, out of the pad
Bad at
- It is an air pad with thin fabric -- punctures are the dominant failure and you must carry the patch kit
- Audibly crinkly, which some tent partners genuinely object to
- Expensive for something a sharp twig can end
