R-value carries the warmth; thickness decides whether your hip lands · review
The thinnest mat in this group to publish a 4.3 R-value — an inch and a half of air-foam hybrid under 75-denier polyester, self-inflating and packing to eight by twelve inches.
An Oxylus 4.3 R-value insulated air-foam self-inflating sleeping pad, four seasons.
Gear Doctors states a mat compressing to 8”(20 cm (7.9 in)) × 12”(30 cm (11.8 in)) at 35.2 oz (997 g (35.2 oz)), expanding to 72”(183 cm (72 in)) × 20”(52) at a thickness of 1.5”(3.8 cm (1.5 in)); setup from pack to sleep-ready in under five minutes — unroll, open the valve, let it self-inflate, adjust with a few breaths, close the valve — and repacking by opening the valve and rolling, held with an included elastic band; a hybrid 4.3 R-value core with a 75D micro-coated polyester shell resisting UV, moisture and abrasion, leak-proof, with a hypoallergenic outer layer and a lifetime replacement guarantee; and use on grass, rock, snow or sand.
No standard named.
Foam inside the air.
An air mat loses heat because the air inside it circulates. Open-cell foam breaks that air into pockets that cannot move, and it draws air in when the valve opens.
So a thinner mat with foam can out-insulate a fatter hollow one. The other 4.3 in this group is 2.6 inches thick; this one is 1.5.
This shelf’s introduction separates the two questions exactly here: R-value carries the warmth, thickness decides whether your hip lands.
The figure this shelf’s introduction asks to see attached.
Since ASTM F3340, R-values across makers can be compared — if the figure is quoted against it.
Not one of the eight mats in this group names it. Two publish 4.3, and the two are built differently enough that the question is a real one.
The fabric as a pressure vessel.
On a hollow air mat the fabric holds air. On a self-inflating mat it also restrains foam that wants to expand, so the same denier is doing more.
Seventy-five is the joint-thickest fabric on this shelf, against 40D on one air mat and 20D on the lightest. UV, moisture and abrasion resistance and a hypoallergenic layer are all named with it.
A conversion that does not convert.
“72”(183cm (72 in))×20”(52)”. The length is right; 20 inches is 50.8 centimeters.
One point two centimeters changes nothing in use. It is worth a line only because this shelf is compared on published figures, and a conversion that is out is a specification typed rather than measured.
Twenty inches is also the second narrowest width here.
Gear Doctors’ instructions carry the inflation and the repack. Nothing here replaces them, and nothing on this page describes any product as safe.
The American Amazon store was listing it at about $51 at the time of writing.
Every figure here is what Keepa held on the day this page was last revised. Offers and prices shift without warning.
Prices quoted in this text were read on October 8, 2026. The live price is at the top of the page.
| R-value | 4.3 R-value, published, from a hybrid air-foam core — the joint-highest in this group |
|---|---|
| Standard quoted | None |
| Thickness | 1.5 in — 3.8 cm. The thinnest mat in this group to publish a 4.3 R-value |
| Packed size | 8 in (20 cm) × 12 in (30 cm) |
| Weight | 35.2 oz — 997 g |
| Width | 20 inches, published as 20" with a parenthetical 52 cm (20.5 in); 20 inches is 50.8 cm (20 in) |
| Length | 72 inches — 183 cm |
| Fabric denier | 75D micro-coated polyester, stated UV-, moisture- and abrasion-resistant and leak-proof, with a hypoallergenic outer layer |
| Inflation method | Self-inflating: unroll, open the valve, let the foam expand, then adjust with a few breaths and close the valve. An elastic band is supplied for repacking |
| Amazon reference | B07GGZWRK6 |
| EAN | 7311039568977 |
By being a hybrid rather than an air mat. The listing calls it an air-foam core: open-cell foam inside the chambers, which both draws air in when the valve opens and breaks the air into small pockets that cannot circulate. Circulating air is how a thick air mat loses heat, so a thinner mat with foam in it can out-insulate a fatter one that is hollow. The other 4.3 in this group is 2.6 inches thick, so the same figure comes from an inch more. This shelf's introduction separates the two questions precisely for this reason: R-value carries the warmth, thickness decides whether your hip lands.
Twenty inches, which is 50.8 centimeters. The bullet reads "72"(183cm (72 in))×20"(52)" — the length converts correctly and the width does not. One point two centimeters is nothing in use, and it is worth noting only because this shelf is compared on published figures and a conversion that does not convert is the sign of a specification typed rather than measured. Twenty inches is the second narrowest mat in this group, and this shelf's buying tip says shoulders off the edge undo the rating.
The face against grit, which this shelf's introduction names as the reason to read the figure at all. Seventy-five denier is the joint-thickest fabric on this shelf — the other 4.3 mat publishes the same — against 40D on one air mat and 20D on the lightest. On a self-inflating mat the fabric is also the pressure vessel for foam that wants to expand, so it is working harder than on a hollow air mat. The listing adds UV, moisture and abrasion resistance and a hypoallergenic outer layer, which is a fuller fabric statement than anything else here.
Close prices, same category: comparable camping gear. We keep only the specifications all of them publish, because a column with gaps compares nothing.
| Model | Price | R-value | Thickness | Packed size | Weight |
|---|---|---|---|---|---|
| Gear Doctors Oxylus self-inflating mat | $51 | 4.3 R-value, published, from a hybrid air-foam core — the joint-highest in this group | 1.5 in — 3.8 cm. The thinnest mat in this group to publish a 4.3 R-value | 8 in (20 cm) × 12 in (30 cm) | 35.2 oz — 997 g |
| Therm-a-Rest Z Lite Original | $50 | R-value 1.7, published — the lowest figure in this group | Not published as a figure. The folded height of 5.5 inches over four folds implies a thin pad; the construction is dimpled molded foam | 20 × 5 × 5.5 in folded, accordion-style | 14 ounces — about 397 g (14 oz) |
| Gear Doctors Ether air mat, 17.5 oz | $32 | 2 R-value, published, stated for spring and summer camping | Variable and published both ways: 3.35 in at the edges tapering to 2.36 in at the center — the only variable thickness in this group | 8.6 in high by 3.1 in diameter — the smallest pack in this group | 17.5 oz — about 496 g (17.5 oz) |
| FUN PAC 01 mat with pillow | $30 | Not published | Published twice and differently in the same bullet: the heading reads 3" thick, and the text gives dimensions of 78 × 27 × 8 inches | Not published. Stated to be weighed and sized "only like a water bottle" | Not published. The shipping weight is about 680 g (24 oz) |
Four-season warmth from the smallest self-inflating pack here
Amazon reports what buyers took in the month before this page was last checked: at least 300.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
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
