The comfort rating, not the season name, describes your night · review
The only bag here to publish a comfort and a limit figure separately — and, like every other bag in this group, it names no standard behind them.
A 400 GSM fill, comfort to +4 °C (39 °F), limit to -2 °C (28 °F) and an extreme figure of -17 °C (1 °F), a classic mummy cut, left and right versions that couple into a double, a padded head area with a drawcord, a two-way zip with a baffle and an anti-snag strip, all-polyester construction with a water-repellent outer, machine washing at 30 °C (86 °F), a compression sack, and a total weight of 1.55 kg (3.4 lb).
+4 °C comfort and -2 °C limit. Two points rather than a range, which is how a tested bag is described — but no standard is named here, so they remain the maker’s own figures.
-17 °C extreme. This third number belongs to a different question entirely. In the standards it marks survival rather than sleep; it is not a temperature to plan a night around, and it is not a figure this page ranks on.
It is the density of the wadding, in grams per square meter. It is not the weight of insulation in the bag. Two bags at 400 GSM in different sizes carry different amounts of fill, and only one of them may suit you.
The zip. A two-way zip that opens from the foot, a baffle behind it so the cold does not come through the teeth, and an anti-snag strip so the lining is not chewed. Those three details are named, and they are what separates a bag you can use from one you fight.
Choose the zip side. Left and right versions exist so two bags couple into a double, and getting two of the same hand means they will not.
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.
| Comfort rating | +4 °C (39 °F) — stated; no standard is named, so it is an unstandardized figure |
|---|---|
| Limit rating | -2 °C (28 °F) — stated; no standard is named, so it is an unstandardized figure |
| Standard quoted | None named — neither EN 13537 nor ISO 23537 appears, and a third figure of -17 °C (1 °F) is published as an extreme value, which is not a temperature to plan a night around |
| Fill power | Not published on the listing — fill power describes down, and this bag is stated as all polyester |
| Fill weight | No weight published — the maker publishes 400 GSM, a fill density in grams per square meter, not the grams of insulation in the bag |
| Down or synthetic | Synthetic — stated as entirely polyester, with a soft inner lining |
| Shell denier | Not published on the listing — a hard-wearing water-repellent outer is described, with no yarn weight |
| Baffle construction | Not published on the listing — a padded head area, a zip baffle and an anti-snag strip are named; the body construction is not |
| Packed size | Not published on the listing — a compression sack is supplied and the pack size is described only as small |
| Weight | 1.55 kg (3.4 lb) — stated as the total weight |
| Amazon reference | B0FGJDF3NT |
| EAN | 4251379387889 |
Under EN 13537 and ISO 23537 they are two points from the same mannequin test: comfort is where a standard sleeper rests without curling up, limit is where they can still sleep curled. This listing uses both words and names no standard, so treat the pair as the maker’s own indication.
Grams per square meter of the insulation layer. It says how dense the wadding is, not how much of it is in the bag — a longer or wider bag at the same GSM contains more insulation and weighs more. It is a useful comparison between bags of similar size and nothing more.
No. None named — neither EN 13537 nor ISO 23537 appears, and a third figure of -17 °C (1 °F) is published as an extreme value, which is not a temperature to plan a night around. What the listing does publish instead is the comfort rating: +4 °C (39 °F) — stated; no standard is named, so it is an unstandardized figure.
7.8/ 10
The most carefully specified temperature claim in this group, with the same missing standard as all the others. For a mummy bag at 1.55 kg (3.4 lb) with real hardware detail it earns its place; read the +4 °C (39 °F) as the maker’s figure rather than a tested one.
Three-season camping where a stated comfort and limit pair matters more than a published packed size.
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.
Mummy · 300 GSM cotton and hollow-fiber fill · comfort 15 °C (59 °F) to 20 °C (68 °F) · about 1300 g (45.9 oz) · 35 × 25 cm (13.8 × 9.8 in) packed
A three-season mummy bag that publishes weight, packed size and fill density, and puts its comfort range at 15 °C (59 °F) to 20 °C (68 °F) with no standard behind it.
Best for: Spring to autumn trips where about 1300 g (45.9 oz) into a 35 × 25 cm (13.8 × 9.8 in) roll is the constraint that matters.
20 °F, no standard · 82 × 33 in · polyester shell, brushed tricot liner · no-snag zip
Five bullets, five facts and no padding: a 20 °F mummy bag of 82 by 33 inches with a drawstring hood, a brushed tricot liner and an anti-snag zip with contrasting webbing.
Best for: A straightforward cold-weather mummy bag with nothing to decode
≈ $43
0 °F, no standard · 82 × 32 in, to 6 ft 2 in · Coletherm fill · quilting against cold spots
The coldest figure in this group at 0 °F, and the only bag here that publishes a quilting construction against cold spots, a named insulation, a draft tube and a box foot together.
Best for: A genuinely cold night in a tent, for a camper up to six foot two
≈ $94
Prices in these summaries were read on the dates each review gives. The live figure sits beside every product.
