Swift UL 20 Sleeping Bag

The widest of our 20 degree mummy bags, the Swift is a favorite for those looking for a few extra inches around the chest while retaining the efficiency of the classic mummy shape. With lighter Pertex Endurance UL fabric and 900+ fill power down, this is the ultimate in space without the weight.

UL: Ultralight. Pertex® Endurance® 10 denier water-resistant/breathable fabric.

Availability: Select color & length for availability

Availability Information


  • Mummy shape (wider width) with #5 YKK two-way, separating zipper with locking sliders
  • Passive collar provides an extra cushion of down around your neck to trap the heat
  • Trapezoidal footbox allows your feet to fall in a natural pose without compressing the sides
  • Continuous baffles let you position the insulation where you need it
  • 3D contoured hood opens wide for warm nights and cinches tight when the temps start to drop
  • Generous draft tube prevents cold air from seeping past the zipper
  • Includes storage bag & stuff sack


Mummy Sleeping Bags

Feathered Friends wide mummy sleeping bags have more space throughout, especially in the shoulders. This is perfect for those with broader builds, or those preferring to stash a lot of gear inside the bag.

Regular Length
Fits up to 6' 0" | 183 cm

Long Length
Fits up to 6' 6" | 198 cm

Have questions on sizing? Feel free to Contact Us - We're happy to help!

Additional Info

Length Reg 6' 0" / 183 cm | Long 6' 6" / 198 cm
Dimensions 64" / 58" / 40"
Fill Power 950+ Goose Down
Fill Weight Reg 18.8 oz / 533 g
Long 19.7 oz / 558 g
Lining Fabric Flite 15 denier ripstop nylon
Country of Origin Made in Seattle, USA of imported materials
Packed Size 9L
Average Weight Reg 29.2 oz / 829 g
Long 31.1 oz / 881 g
Sleeping Bag Shell Fabric Pertex® Endurance UL
Temperature Rating 20ºF / -6.67ºC
Zip Side Left

Customer Reviews (7)

Amazing bag!!Review by PinkPanther
This is my 2nd Swift bag and it’s amazing! So comfy and much warmer then the rating I would say. I love the wide girth!! It’s like sleeping wrapped in a cloud. (Posted on 1/27/2019)
Most Excellent BagReview by Rick
I got this bag last year in the early spring 2017. We had a trip planned to Glacier National Park and Yellowstone in Sept so I wanted something I could use in cooler weather. What a fantastic bag. The quality is beyond any other bag I have ever owned. (Marmont, North Face and Kelty) The zipper is pretty much one hand use with no snags. The comfort and warmth combined with the ability to pack down so small is phenominal. I use a cmpression sack from sea to summit. I put an extra change of clothes in the bottom, then the bag and a pillow.. all in one sack and it fits nicely in the sleeping bag compartment of all my backpacks. I like a wider bag and this one is great. I can move around w/o the thing sticking to me like a straight jacket. I wish I had purchased this bag years ago... (Posted on 4/19/2018)
Swift UL/long: Better than I expected. Review by Joe
***** I have to give it five stars.
I had high expectations, for the price. From what I have seen so far, it exceeds them. I tend to be claustrophobic in a mummy bag and that is why I chose to go with a Feathered Friends bag. Also, I was looking for something light, to backpack with. I had anticipated taking it out of the box and finding that it would be thinner than I had hoped. Not so. Right out of the package, it was very full. I slept in it on my bed last night and there is no doubt as to the quality. I also feel that the temperature rating is on the conservative side.
I am looking forward to backpacking with it.
(Posted on 2/14/2018)
Still going after 20 yearsReview by Michael
I have been backpacking since the early 80's. My wife bought this for me at Christmas about 20 years ago and I've taken it every year since I got it for at least 5 trips a year. In the winter too. I've been comfy up to 10 degrees. I opted for overfill and all the extra features when I bought it. Do the math; how much is that a year? Don't buy a cheap import. Quality doesn't cost- it pays. I'm looking at buying a real winter bag now that I'm 52 and sleep a little colder on winter trips. Eider or Ibis? (Posted on 8/1/2017)
Rainier CraterReview by Shane
Slept in this bag on the summit crater of Rainier at 4 degrees, almost 20 degrees below its rating and it kept me just warm enough to live to tell about it. Great quality, dont skimp on your bag ... (Posted on 11/6/2016)
Amazing sleeping bag!Review by Nicholas
An incredible quality sleeping bag, well worth the investment! I don't need to discuss the specs, you can read them here and they are accurate. Incredibly high quality down, super light weight materials but durable at the same time. I would highly recommend! I also decided to go with the Swift bag because of the extra space, I was willing to add a few extra ounces. I tend to move around in my sleep and this bag is just enough space while remaining very comfortable. 5 stars! (Posted on 5/2/2016)
I love itReview by BMcC
I have owned it for one day 14 degree open biv woke up with at least 4 inches of snow on me wind blew very hard all night warm and dry don't try this at home I knew I was leaving very impressive I was just testing it it was cold enough that it didn't get wet but I am impressed (Posted on 1/14/2016)

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