Pads That Work on Snow
R 5.5 is where the pairing table stops recommending a three-season pad, and it is also roughly where prices jump. What is worth knowing before spending the money is that two pads stacked add up: a foam pad at R 2 under an air pad at R 4.5 gives you about R 6.5 for sixty dollars and fourteen ounces, which is a real alternative to a single winter pad.
How this list is orderedPads with an R-value of 5.5 or above, ranked warmest first. 5.5 is the floor for reliably sleeping on frozen ground in this catalogue's pairing table. 8 entries qualify.
- 1
Exped
Exped Ultra 8R
R 8.8, winter
1 lb 4 oz · ~$230 · Backpacking pad · 3.5 in thick
Exped's winter flagship insulates with actual down inside the air chambers, which is why it reaches R 8.8 — the highest figure in this catalogue — at twenty ounces. Exped quotes it as good to about -49 °F, which is a number for expeditions rather than for anyone's weekend. Down inside a pad has one obvious vulnerability: moisture from breath-inflation will eventually kill it, which is exactly why the Schnozzel pump bag is in the box and why using it is not optional on this model.
- 2
NEMO
NEMO Tensor Extreme Conditions
R 8.5, winter
1 lb 2 oz · ~$260 · Backpacking pad · 3.5 in thick
R-value 8.5 is the warmest figure in this catalogue and among the warmest published anywhere, and NEMO gets there at 18 ounces — which is what makes this the pad that turns up under expedition sleeping bags on glacier trips. Four suspended film layers instead of the All-Season's fewer, in the same quiet Spaceframe structure and the same 3.5-inch loft. The honest framing is that almost nobody needs 8.5: past about R 6 you are insulating against ice, and on anything but snow the extra is weight and money you spent to feel warmer than you had to.
- 3
Exped
Exped MegaMat
R 8.1, winter
4 lb 9 oz · ~$260 · Camping mattress · 4 in thick
The MegaMat is the reference car-camping mattress, and the reason is its foam: vertically laminated rather than a simple slab, so four inches of loft stays supportive under a hip instead of compressing to nothing. R-value 8.1 is warmer than any air pad here except Exped's own 8R, and Exped rates it to about -40 °F. It weighs four and a half pounds and rolls to the size of a sleeping bag, and once inflated it gets made up with a fitted sheet and forgotten about.
- 4
Sea to Summit
Sea to Summit Comfort Deluxe Self Inflating
R 7.7, winter
4 lb 2.8 oz · ~$265 · Camping mattress · 4 in thick
R-value 7.7 and four inches of foam, with a stretch-knit face that takes a fitted sheet. This is the warmest camping mattress in the catalogue and the closest thing here to sleeping at home. The Air Frame construction puts a stabilising structure inside the foam, which is what stops a four-inch pad from feeling like a waterbed, and the 52-inch Double version genuinely fits two adults without the usual valley down the middle.
- 5
Therm-a-Rest
Therm-a-Rest NeoAir XTherm NXT
R 7.3, winter
15.5 oz · ~$230 · Backpacking pad · 3 in thick
Add two and a half ounces to an XLite and you get a pad rated 7.3 — enough to sleep on snow — which is the trade that makes the XTherm the pad winter backpackers and shoulder-season sceptics buy instead. The extra warmth comes from more layers of the same reflective film rather than from bulk, so it packs almost as small and feels the same underneath. The 70-denier bottom fabric is a real upgrade over the XLite's 30D and the reason this one survives on crusted snow and scree. It is a lot of R-value to carry in July, and the honest answer for most three-season use is that it is more pad than the trip needs.
- 6
Therm-a-Rest
Therm-a-Rest MondoKing 3D
R 7, winter
4 lb 6 oz · ~$260 · Camping mattress · 4.25 in thick
Four and a quarter inches of self-inflating foam, 25 inches wide, R-value 7. This is the pad that ends the argument about whether car camping has to be uncomfortable. It weighs four and a half pounds and rolls up to the size of a small duffel, so it never goes in a backpack, but nothing you can carry sleeps like it. The R-value is high enough for winter truck camping and cold cabin floors, and the stretch-knit top takes a fitted sheet.
- 7
Exped
Exped Ultra 6.5R
R 6.9, winter
15.5 oz · ~$200 · Backpacking pad · 3.5 in thick
The oddity in this catalogue: an R 6.9 pad that weighs half an ounce less than the R 3.2 pad from the same brand. Exped's naming is confusing — the model is called 6.5R and tests at 6.9 — but the numbers are real and they make this the best warmth-per-ounce pad here, at 0.45 R per ounce. Three and a half inches thick, silent batting insulation, and again the same price in every width. If you were going to buy one insulated pad and use it from May to October and occasionally in snow, this is the strongest argument in the catalogue.
- 8
Therm-a-Rest
Therm-a-Rest LuxuryMap
R 6, winter
4 lb 3 oz · ~$220 · Camping mattress · 3 in thick
The MondoKing's cheaper, thinner sibling, and the better buy for most campers. Three inches instead of four and a quarter, R-value 6 instead of 7, about a pound lighter and $40 cheaper in the comparable size. The trick in the name is that the foam is die-cut in different densities along the pad — firmer under the hips, softer under the shoulders — which is why it feels better than three inches has any right to.
The top three, in full
Exped
Exped Ultra 8R
Exped's winter flagship insulates with actual down inside the air chambers, which is why it reaches R 8.8 — the highest figure in this catalogue — at twenty ounces. Exped quotes it as good to about -49 °F, which is a number for expeditions rather than for anyone's weekend. Down inside a pad has one obvious vulnerability: moisture from breath-inflation will eventually kill it, which is exactly why the Schnozzel pump bag is in the box and why using it is not optional on this model.
Best for: Expedition and deep-winter camping
Full spec sheet
R-value 8.5 is the warmest figure in this catalogue and among the warmest published anywhere, and NEMO gets there at 18 ounces — which is what makes this the pad that turns up under expedition sleeping bags on glacier trips. Four suspended film layers instead of the All-Season's fewer, in the same quiet Spaceframe structure and the same 3.5-inch loft. The honest framing is that almost nobody needs 8.5: past about R 6 you are insulating against ice, and on anything but snow the extra is weight and money you spent to feel warmer than you had to.
Best for: Glacier camps, winter basecamps and sleeping on snow
Full spec sheet
Exped
Exped MegaMat
The MegaMat is the reference car-camping mattress, and the reason is its foam: vertically laminated rather than a simple slab, so four inches of loft stays supportive under a hip instead of compressing to nothing. R-value 8.1 is warmer than any air pad here except Exped's own 8R, and Exped rates it to about -40 °F. It weighs four and a half pounds and rolls to the size of a sleeping bag, and once inflated it gets made up with a fitted sheet and forgotten about.
Best for: Car camping, van sleeping and cold basecamps
Full spec sheet