Head-to-head · Best 0 Degree Sleeping Bags

Feathered Friends Ibis ES 0 vs Western Mountaineering Kodiak MF

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Feathered Friends Ibis ES 0 comes out ahead by a narrow margin (4.6 vs 4.4). The gap is mostly about Winter campers in cold, wet, or condensation-prone conditions who want a conservatively rated bag and will pay top dollar for a waterproof shell. — read the strengths below before deciding.

Higher ratedRanked #1 in Best 0 Degree Sleeping Bags

Feathered Friends Ibis ES 0

4.6

2 sourcesall derived$859as of Aug 1

The Ibis ES 0 pairs 900+ fill power goose down with a waterproof-breathable Pertex Shield EX shell, which makes it the bag to beat for cold, damp winter conditions. Feathered Friends rates conservatively, so its 0°F sits closer to a true comfort rating than a survival limit. It is the widest of the brand's zero-degree bags, and also among the heaviest here at 3 lb 2 oz.

Strengths

— 900+ fill power goose down, the highest-loft insulation in this group
— Waterproof-breathable Pertex Shield EX shell handles condensation and damp tents
— Conservative 0°F rating means real-world comfort at the stated temperature

Watch-outs

— Heavy for a 0°F down bag at 3 lb 2.4 oz for the regular
— List price of $859 puts it at the top of the category
— Waterproof shell adds weight and slightly less breathability than open nylon

$859 · Buy at featheredfriends.com Full review →

Ranked #3 in Best 0 Degree Sleeping Bags

Western Mountaineering Kodiak MF

4.4

2 sources1 derived$795as of Aug 1

The Kodiak MF is the warmest 0°F bag most reviewers have ever tested, beating its rating with a roomy, side-sleeper-friendly cut. OutdoorGearLab consistently names it their top winter pick and found it performed more like a -20°F bag than a 0°F one. The trade-off is a list price near $900 and a wide cut that costs some warmth-to-weight efficiency against narrower mummies.

Strengths

— Tested warmer than its 0°F rating; held testers to roughly -10°F with light layering
— 1.88 lb of 850+ fill goose down with continuous baffles you can shift top-to-bottom
— Wide-cut mummy with generous shoulder, hip and footbox room for side sleepers

Watch-outs

— List price near $895-$950 is among the highest in the category
— Wide cut adds dead air space, so it is not the most weight-efficient 0°F option
— Continuous baffles can shift down underneath you if not redistributed

$795 · Buy at shop.gohunt.com Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Feathered Friends Ibis ES 0

The highest-loft and most weather-resistant bag here thanks to 900+ fill and a Pertex Shield EX shell, rivaling the Western Mountaineering Kodiak MF for warmth but heavier than it, the Mountain Hardwear Phantom 0, the Therm-a-Rest Parsec 0F and the Sea to Summit Spark 0F.

Western Mountaineering Kodiak MF

The roomiest and warmest bag here, beating the Mountain Hardwear Phantom 0 and Therm-a-Rest Parsec 0F on real-world warmth and the Feathered Friends Ibis ES 0 on cut width, but it is heavier and pricier than the lighter Sea to Summit Spark 0F.

Specs side-by-side

Spec	Feathered Friends Ibis ES 0	Western Mountaineering Kodiak MF
Temperature Rating	0°F (-17.7°C) comfort	0°F (-18°C)
Fill Power	900+ goose down	850+ goose down
Fill Weight	1 lb 15.2 oz (884 g)	1.88 lb (30 oz)
Total Weight	3 lb 2.4 oz (1429 g)	2 lb 12 oz
Shell	Pertex Shield EX waterproof-breathable	20D MicroLite XP nylon
Shoulder Girth	59 in	—
Packed Size	17 L	—
Origin	Made in Seattle, USA	—
Cut	—	Wide mummy, continuous baffles
Warranty	—	Lifetime craftsmanship
Material	—	goose-down

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