The comfort rating, not the season name, describes your night · review
The widest bag in this group at thirty-nine inches, with a two-way zip for airflow, a published 30 to 70 °F range and a lifetime replacement guarantee.
A 3-season XXL camping sleeping bag in orange and black.
VENTURE 4TH states a lifetime replacement guarantee with every bag tested before shipping; comfort in temperatures from 30 to 70 °F with a breathable design and a two-way zipper to adjust airflow for spring, summer and autumn; an XXL size of 90 by 39 inches for tall campers; high-grade polyester construction, water-resistant and machine washable; and a compression sack with anti-snag zippers.
No standard. No comfort or limit figures. No fill named. No denier. No weight.
A range, not a rating.
This shelf’s introduction describes what a rating is: a comfort figure and a limit figure measured on a heated mannequin to EN 13537 or ISO 23537. A span of forty Fahrenheit degrees is a statement that the bag is pleasant across a season.
At its cold end it is about minus one Celsius.
Publishing both ends is still better than a single bare number, which four bags in this group do. It is not a figure that can be lined up against a tested bag.
The roomiest here, and the air that comes with it.
This shelf’s introduction ends on fit: length, shoulder girth and foot box shape decide dead air, and dead air is what the rating assumes.
The mummy bags in this group are 32 and 33 inches across. This is 39, and every extra inch is volume the sleeper heats.
For a broad or restless camper that is the point of the bag. On a cold night it is why a mummy shape rates lower at the same fill.
What a two-way zipper is actually for.
Ventilating the foot without opening the chest, on a bag rated to 70 °F at its warm end. One other bag in this group has a separate foot zip; one has a foot zip for the same purpose; four have neither.
Not left to a retailer.
Every bag stated tested before shipping, and replaced free if anything goes wrong.
On a synthetic bag the things that fail are a zip, a seam and the loft after repeated compression. A replacement guarantee is the only one of those three a buyer can act on, and two other bags in this group publish a warranty at all.
VENTURE 4TH’s instructions carry the washing and the ratings. Nothing here replaces them, and nothing on this page describes any product as safe.
The American Amazon store was listing it at about $55 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.
| Comfort rating | Not published as a comfort figure. The bag is published as comfortable in temperatures from 30 to 70 °F |
|---|---|
| Limit rating | Not published |
| Standard quoted | None |
| Fill power | Not applicable — synthetic fill |
| Fill weight | Not published |
| Down or synthetic | Synthetic. High-grade polyester is named for the construction; the fill is not named separately |
| Shell denier | Not published. The shell is stated water-resistant and machine washable |
| Baffle construction | Not published. A two-way zip and a breathable design are stated for airflow |
| Packed size | Not published. A compression sack is included |
| Weight | Not published. The shipping weight is about 2 kg (4.4 lb) |
| Amazon reference | B0897D54RX |
| EAN | 5060559190787 |
It is a usable range rather than a rating in the sense this shelf's introduction means. A tested bag carries a comfort figure and a limit figure, measured on a heated mannequin to EN 13537 or ISO 23537; a range from 30 to 70 Fahrenheit is a statement that the bag is pleasant across forty degrees of weather, which is a different kind of claim. Taken at its cold end it is about minus one Celsius. Publishing both ends is more informative than a single bare number — four bags in this group publish one figure and nothing else — and it still cannot be compared with a standard-tested bag.
Air to warm. This shelf's introduction ends on fit for exactly this reason: length, shoulder girth and foot box shape decide dead air, and dead air is what the rating assumes. A rectangular bag 39 inches wide is the roomiest in this group — the mummy bags here are 32 and 33 inches — and every extra inch is volume the sleeper has to heat. For a broad or restless camper that is a fair trade and it is why the bag exists; for a cold night it is the reason a mummy shape rates lower at the same fill.
It is published in the listing itself rather than left to a retailer, which is the part that matters: a lifetime replacement guarantee, with every bag stated tested before shipping. Two other bags in this group publish a warranty — a lifetime one and a five-year limited one — and four publish none. On a synthetic bag the failure modes are a zip, a seam and loft lost after repeated compression, and a replacement guarantee is the only one of the three that a buyer can act on.
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 | Comfort rating | Down or synthetic | Shell denier | Baffle construction |
|---|---|---|---|---|---|
| VENTURE 4TH V4-02-XXL three-season bag | $55 | Not published as a comfort figure. The bag is published as comfortable in temperatures from 30 to 70 °F | Synthetic. High-grade polyester is named for the construction; the fill is not named separately | Not published. The shell is stated water-resistant and machine washable | Not published. A two-way zip and a breathable design are stated for airflow |
| TETON Sports 1022 TrailHead mummy bag | $65 | Not published as a comfort figure. The bag is published as a 20 degree bag | Synthetic: innovative microfibre insulation, stated to offer more loft and compressibility | Not published. A soft-to-the-touch liner is stated | A zipper draft tube, stated, with a roomy foot box |
| Amazon Basics AMZ-3382SB mummy bag | $43 | Not published as a comfort figure. The bag is published as 20 °F | Synthetic. The fill is not named; the shell is polyester and the liner brushed tricot | Not published. A robust polyester shell is stated | Not published. A mummy shape with an adjustable drawstring hood is stated |
| TETON Sports LEEF mummy bag, 20 F | $75 | Not published as a comfort figure. This variant is published as 20 F, with 0, 20 and 30 degree options offered | Synthetic. The listing states efficient insulation without naming it | Not published | Not published |
A tall or broad camper in mild weather, who wants a bag replaced if it fails
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.
Mummy · 400 GSM synthetic · comfort +4 °C (39 °F) and limit -2 °C (28 °F) stated · 1.55 kg (3.4 lb) total · compression sack · no standard named
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.
Best for: Three-season camping where a stated comfort and limit pair matters more than a published packed size.
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
