R-value carries the warmth; thickness decides whether your hip lands · review
The only mat in this group to publish an R-value — 4.8, with no standard named beside it — on a self-inflating foam core at 1.85 kg (4.1 lb).
A self-inflating mat with two valves, reaching about 80% on its own before being topped up by mouth, a high-rebound foam core in a 190T polyester fabric, about 5 cm (2 in) thick inflated, an R-value of 4.8, an inflated size of 200 × 63 × 5 cm (78.7 × 24.8 × 2 in), a packed size of 19 × 19 × 33 cm (7.5 × 7.5 × 13 in), a weight of 1.85 kg (4.1 lb), and the ability to be joined to further mats.
R-value 4.8. Eight of the nine mats in this group publish nothing about warmth at all. This one publishes it in the title and again in the bullets, and it is the number a mat should be chosen on: R-value measures resistance to heat flow, and it is what decides whether the ground takes your heat all night.
What is missing beside it. No standard. Since ASTM F3340 the industry has had a common test, and figures measured to it can be lined up directly. A 4.8 without a named test is the maker’s figure — much better than nothing, and not the same as a tested one.
1.85 kg, and a 19 × 19 × 33 cm roll. Both the highest in this group. The foam that does the insulating is the foam that will not compress to the size of a water bottle. That is the whole trade, and this mat sits at the warm end of it.
Thinner than the 10 and 12 cm (4.7 in) air mats here. A self-inflating mat does not need the height, because the foam holds its shape under a hip rather than letting air move out from under it. Thickness and warmth are different questions, and this is the mat where that is clearest.
R-values add, so if you already have a thin foam mat, it goes under this one and the two sum. Check the 19 × 19 × 33 cm (7.5 × 7.5 × 13 in) packed size against your pack before anything else.
The American Amazon store returned nothing, so the buy link opens a local search rather than a page that is not there.
Every figure here is what Keepa held on the day this page was last revised. Offers and prices shift without warning.
A listing is not an offer: the reference exists on these stores, availability changes daily.
| R-value | 4.8 — stated, in the title and in the bullets |
|---|---|
| Standard quoted | None named — the 4.8 is published without an ASTM F3340 reference or any other test beside it |
| Thickness | About 5 cm (2 in) inflated — stated |
| Packed size | 19 × 19 × 33 cm (7.5 × 7.5 × 13 in) — stated |
| Weight | 1850 g (65.3 oz) (1.85 kg) — stated, with no label saying what is counted |
| Width | 63 cm (24.8 in) — stated as part of a 200 × 63 × 5 cm (78.7 × 24.8 × 2 in) inflated size |
| Length | 200 cm (78.7 in) — stated as part of a 200 × 63 × 5 cm (78.7 × 24.8 × 2 in) inflated size |
| Fabric denier | Not stated as a denier — the fabric is given as 190T polyester, which is a thread count |
| Inflation method | Self-inflating through two valves — stated to reach about 80% on its own in a few minutes, then topped up by mouth; the first inflation is stated to take longer |
| Amazon reference | B09HX877BB |
| EAN | 6927595797181 |
It is a measure of resistance to heat flow, and 4.8 is the sort of figure normally described as a four-season mat. R-values add up, so a foam mat underneath adds its own. Without a named standard, treat 4.8 as the maker’s figure rather than as directly comparable with an ASTM F3340 result.
Because there is foam inside as well as air. The foam is what does the insulating and what pulls air in when the valve opens; it is also why the mat packs to 19 × 19 × 33 cm (7.5 × 7.5 × 13 in) rather than the size of a water bottle. The weight buys the R-value.
No. None named — the 4.8 is published without an ASTM F3340 reference or any other test beside it. What the listing does publish instead is the inflation method: Self-inflating through two valves — stated to reach about 80% on its own in a few minutes, then topped up by mouth; the first inflation is stated to take longer.
7.8/ 10
The only mat here you can choose on warmth rather than on thickness, and the heaviest and bulkiest of the nine because of it. For cold ground it is the obvious answer; for a light pack it is not.
Cold-ground camping where an R-value on the page matters more than 1.85 kg (4.1 lb) in the pack.
Specifications: the manufacturer sheet for camping and hiking gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
R 2.1, standard unnamed · XPE foam with aluminum film · 70.8 × 23.6 × 0.36 in · 0.7 lb
A folding XPE foam mat with a heat-reflective aluminum film and a published insulation rating of 2.1 — "tested to standard", with the standard never named.
Best for: A foam layer that packs flat rather than rolled, with a figure behind its warmth
≈ $25
531 g (18.7 oz) · 190 × 60 cm (74.8 × 23.6 in) inflated and 225 × 70 cm (88.6 × 27.6 in) flat · 40D material · inflated by breath · repair kit included · no R-value
A 531 g (18.7 oz) mat that publishes both its flat and its inflated dimensions — an honest distinction most listings skip — and no thickness and no R-value.
Best for: Lightweight trips where 531 g (18.7 oz) and a 190 cm (74.8 in) sleeping length are the specification, and warmth comes from the bag.
Built-in foot pump · 40D nylon/TPU · 78 × 27 in · 3 in in one line, 8 in in the next
The widest mat in this group at twenty-seven inches, with a built-in foot pump, a built-in pillow and side buttons to join two together — and a thickness published as three inches and as eight.
Best for: Two mats buttoned into a double bed, with no separate pump or pillow to pack
≈ $30
Prices in these summaries were read on the dates each review gives. The live figure sits beside every product.
