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Feathered Friends Penguin 20 Review

Feathered Friends Penguin
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Price:  $460 List
Pros:  Top quality down and fabrics, exceptionally versatile design, 4 temperature options, full-length zipper vents feet, sleeps 2 people with optional Groundsheet.
Cons:  On the heavy side.
Manufacturer:   Feathered Friends
By Chris McNamara and Max Neale  ⋅  May 27, 2013
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  • Warmth - 23% 7
  • Weight - 22% 2
  • Comfort - 25% 9
  • Packed Size - 5% 4
  • Features - 10% 9
  • Versatility - 15% 10

Our Verdict

The Feathered Friends Penguin is the one of the most comfortable down sleeping bags we've ever tested. It transforms from its spacious semi-rectangular single person shape into a luxurious two-person setup that feels like a real bed. Snuggling with your honey in this bag is fantastic and sleeping alone in two-person mode might be the most comfortable sleeping bag setup ever. If we were to have one sleeping bag for all outdoor activities including car camping, basecamping, and backpacking, we would choose the Penguin. At 43 oz (2.7 lb) it's not the lightest bag available, but, for many people, we suspect the benefits of the Penguin's comfort and versatility will outshine its moderate weight. The bag uses top-tier 850+ fill down (lots of it!!) and will last for a decade or more of outdoor adventures.

Feathered Friends products are only available online directly from Feathered Friends which often has limited stock. If you need something sooner than custom made we recommend the Western Mountaineering Alpinlite which is more widely available online.

Our Analysis and Test Results

Design Overview

The Penguin is a semi-rectangular down sleeping bag that uses 850+ fill down, top-tier shell fabrics, and can be used with an optional Groundsheet to create a supremely comfortable bed-like two-person sleeping bag. The bag can be used in one person mode, without the Groundsheet, for optimal warmth and thermal efficiency with one person, or with the Groundsheet for luxurious comfort with one person or tremendously warm and snuggly comfort with two. Many sleeping bags try to be comfortable, warm, and lightweight simultaneously, but no other bag we've tested succeeds at blending these objectives to the degree that the Penguin does.


The Penguin is the most comfortable down sleeping bag we've ever tested. (As of 5/28/13) OutdoorGearLab has published reviews for 55 down sleeping bags across all categories from expedition winter to ultralight summer.) The Penguin's semi-rectangular shape provides more space and more comfort than the typical mummy bag that tapers drastically in the lower half. This design gives you more room to move around within the sleeping bag, rather than with the bag, like trim cut mummies. Although the bag is remarkably comfort when used in one-person mode it gets even more comfortable when used in two-person mode in conjunction with the Groundsheet. The abundant space combined with the soft, buttery interior fabric and makes it feels like you are actually sleeping in a bed!! When used with the Groundsheet the Penguin is arguably more comfortable than the Slumberjack Country Squire, a gigantic car camping bag with an integrated sheet.

Left to right: Feathered Friends Penguin  Nemo Nocturne 15  Big Agnes Bellyache Mtn 17 Long. Semi rectangular bags (left) are more comfortable than mummy shapes (center and left).
Left to right: Feathered Friends Penguin, Nemo Nocturne 15, Big Agnes Bellyache Mtn 17 Long. Semi rectangular bags (left) are more comfortable than mummy shapes (center and left).
Some of the bag's smaller, comfort enhancing features are worth describing. The bag has a huge overstuffed neck baffle that cinches with an elasticized cord to seal out cold air. This, in combination with another static drawcord at the top of the bag, allow you to close the neck area in a way that's remarkably comfortable and effective. Many other hoodless bags botch this area by not including enough down between you and the drawcord—they often pinch or irritate your neck. But such a problem does not occur with the Penguin; it's super comfortable and cozy around your face and neck. When used in two person mode the drawcords lie in the center of the bag so that both people can adjust them if needed.

Feathered Friends Penguin 10 hood. Note the overstuffed neck baffle and optional removable hood.
Feathered Friends Penguin 10 hood. Note the overstuffed neck baffle and optional removable hood.
Picky about which side you zipper is on? Fear not, fellow camper, for the Penguin has equal amounts of insulation on both top and bottom and can be used with the zipper on either the right or left side. Also, the Penguin has a full length zipper that extends all the way to the bottom of the bag, i.e. beneath your feet. This lets you poke your toes out on warm nights- in both one and two person modes!


The Penguin is available in 10, 20, 30, and 40-degree models so you can choose the level of warmth that best suits you needs. We feel that the 20-degree version will be best for people that want to use the bag for car camping and backpacking in a variety of three-season conditions. If you plan to primarily use the bag with another person also consider going for a lighter model; seeping with two people in the bag is very warm. Based on our tests we estimate that with two bodies the bag is comfortable to at least 15 degrees below its rating!! This makes it a viable winter setup for two people; you can save a tremendous amount of weight and money by choosing the Penguin over two separate winter sleeping bags.

It's Missing a Hood?!

Yes, and this a good thing. Hood-less sleeping bags have three significant advantages over their hooded counterparts: (1) They're more comfortable. Only a handful of the 70+ sleeping bags we've tested have hoods that are truly comfortable when cinched tight. Separating the hood from the bag allows you to turn over without getting lost inside the hood and without spewing moisture vapor into the bag (which adds weight and reduces loft). Our testers agree that hoodless bag are more comfortable than bags with hoods. (2) Hoodless bags are lighter! Most people do the majority of their backpacking in summer when hoods are rarely needed. Why carry it if you don't need it? (3) Hoodlless bags cost less to manufacture. Why pay the additional cost of a hood if you don't need one?

However, if you plan to camp in temperatures around or below freezing we recommend a hood. Know that you can purchase a hood separately from a few manufacturers and retailers.


The Penguin 20 weighs 43 ounces, or 2 lb. 11oz., which is on the heavy side for lightweight backpacking. For people that go on several 1-7 night backpacking trips each year this weight won't be too cumbersome (most synthetic mummy bags weigh more than the Penguin). Many of our testers are willing and eager to carry the bag on trips because it's so comfortable—they sleep better. If you plan to share the Penguin with another person the bag weighs a mere 21.5 ounces per person, or 27.5 oz per per person with the Groundsheet, which makes it quite light given its tremendous warmth and comfort. Sharing, after all, is a key component of going light. For a fun, quick read, see Patagonia alpine climbing ambassador Kelly Cordes' piece about the ManSpoon, a.k.a. sharing one bag with two men.

If saving weight is your top priority we urge you to consider one of the bags compared in our Ultralight Sleeping Bag Review.

The Penguin packs down small considering its comfort and warmth. Its top quality 850+ fill down is highly compressible and has the added advantage of being more durable than lower fill powers. Down also continues to insulate longer term than synthetic insulation.


The Penguin is versatile in the sense that it is be single best bag we've tested for people that want one bag for both comfortable car camping and weight conscious backpacking trips. Its design is not as versatile as bags with continuous horizontal baffles (see the Feathered Friends Hummingbird

Getting warm in the Hyperlite Mountain Gear UltaMid 2 with the Feathered Friends Penguin sleeping bag used in two person mode. Lots of space inside the UltaMid 2!
Getting warm in the Hyperlite Mountain Gear UltaMid 2 with the Feathered Friends Penguin sleeping bag used in two person mode. Lots of space inside the UltaMid 2!


Feathered Friends bags come with decent stuff sacks that don't do a lot to keep water out. An after-market stuff or compression sack might be in order to keep your bag dryer and less grimey. Check our Best Sleeping Bag Stuff Sack Article for our top recommendations.


Despite its $439 price tag the Penguin 20 is a fantastic value. It's stuffed with tons of expensive top-quality down, uses great fabrics, and will last for a decade (likely more) of adventuring. Plus, it's hard to put a dollar value on a good night's sleep that comes partly from a very comfortable sleeping bag.

To best compare the Penguin's value with others check out the Backpacking Sleeping Bag Price Versus Value Chart.

The Penguin's other versions cost: 10-degree $479, 30-degree $369, 40-degree $339.

Note: also consider purchasing a cheap Camping Sleeping Bag, which cost as little as $40, and an Ultralight Sleeping Bag, which cost as little as $260. Depending on your use, two bags may offer more performance and cost less than the Penguin.


As briefly described above, the Penguin Hood weighs 5.6 ounces, costs $65, and zips to the back of the bag. We found this hood to be very effective at keeping the back and sides of our head warm, but it's not as effective as fixed hoods at keeping your face warm. It performs least well when used in two person mode because the center side does not snap to anything and bunches up when you cinch the drawcord- adding a snap feature to the center would increase comfort for people that want to use the bag in below freezing conditions with two Penguin Hoods. For most people, and particularly for car campers, these limitations will not be a significant unless you are using the bag around or below its temperature rating. And again, our testers prefer the ZPacks Goose Hood, which costs the same amount, for maximum warmth to weight ratio.

The Penguin Groundsheet is a superb $70 accessory that really makes the Penguin. It zips to the bag to create one enclosed sack and features: two sleeves for 20" wide sleeping pads (this creates a remarkably bed-like surface for sleeping), has a soft fleecy interior lining, and weighs 13 oz on our scale. Many of our testers use the bag with this attached even when sleeping alone in the bag with one sleeping pad beneath the Groundsheet, not inserted inside. The extra bag hangs down over the edges of the pad in a way that reduces dead air space.


Chris McNamara and Max Neale