Sea to Summit Ultralight XR Insulated

Four inches thick — the deepest air pad here that still weighs under a pound — built from a grid of individual Air Sprung Cells rather than long baffles, so it behaves more like a mattress and less like a pool toy. That structure is the whole point: a hip pressing into one cell does not push air into the next one, which is what stops the bounce and the roll-off that thick pads usually suffer from. R-value 4.1 is honest three-season. The Airstream pump sack is built into the stuff sack and inflates it in a few passes.

Best for: Side sleepers who want mattress depth in a backpacking pad

The direct descendant of the original 1970s self-inflating mat, and still the pad to buy if you would rather have something that works than something that weighs less. Open the valve, walk away, come back to a pad that is most of the way there. Two inches is thin by modern standards and 24 ounces is nearly twice an XLite, but 75-denier polyester and foam-filled construction mean a pinhole is an inconvenience rather than a night on the ground — the foam still holds you up. R-value 3.8 covers three seasons honestly.

Best for: Backpackers who want a pad that still works after a puncture

R-value 5.3 for $99 is the best warmth-per-dollar figure in this catalogue by a wide margin — the nearest air pad with that rating costs more than twice as much. The catch is 37 ounces and a packed size you would not put in a backpack. Sea to Summit varies the foam density along the pad so the insulation sits where the body is and the weight comes out where it isn't, which is why this is thinner and lighter than most self-inflating pads at this R-value.

Best for: Campground sleeping and anyone who wants warmth without spending