Feathered Friends Hummingbird UL 20/30 Ultralight Sleeping Bag Azure Blue
The Hummingbird 20/30 Degree Ultralight Sleeping Bag - Clover Green
Feathered Friends Hummingbird UL 20/30 Ultralight Sleeping Bag Tangerine Orange
Feathered Friends Hummingbird UL 20/30 Ultralight Sleeping Bag Titanium

Hummingbird UL 20/30 Sleeping Bag

Regular price Sale price$850.00
62 Reviews


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When every gram counts and warmth can’t be compromised the Hummingbird is the versatile bag of choice. With the slimmest cut in our lineup, the Hummingbird leaves no room to spare; perfect for going fast and light. The Pertex® Endurance® UL variation with 950+ fill power down is our lightest mummy bag ever.

Available in 20 Degree & 30 Degree options.

Hummingbird too tight for comfort?  Check out the Swallow or Swift for the same great features with a little more room.

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

"The Hummingbird is almost magical for the warmth and comfort it provides in such a lightweight package."
- OutdoorGearLab

Feathered Friends Hummingbird 30 OGL Top Pick

OutdoorGearLab rated the Hummingbird UL 30 their Top Pick Award
Check out what they had to say about this ultralight sleeping bag Read the Review


  • Mummy shape (narrow) 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

Additional Info

Ideal Sleeper Height Reg 6' 0" / 183 cm
Long 6' 6" / 198 cm
Dimensions 58" shoulder / 52" hip / 38" footbox
Zipper Left Side
Shell Pertex® Endurance® UL
Lining Flite 15 denier ripstop nylon
Fill Power 950+ Goose Down
Origin Made in Seattle, USA of imported materials
Temp Rating 20ºF / -6.67ºC 30ºF / -1.1ºC
Fill Weight Reg 14 oz / 397 g
Long 14.6 oz / 415 g
Reg 11.5 oz / 327 g 
Long 12 oz / 342 g
Average Weight Reg 1 lb 8 oz / 680 g
Long 1 lb 9.4 oz / 720 g
Reg 1 lb 5.4 oz / 606 g 
Long 1 lb 6.4 oz / 635 g
Packed Size 9L 8L


Customer Reviews
4.8 Based on 62 Reviews
5 ★
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United States United States

Proper 20 Degree Bag. Fits Perfect

5'10, 140-ish-pound dude who sleeps warm and on his side. I got a 20-degree Hummingbird named EELWHALE two years ago at a used sale at the F.F store. It was a rental. Despite having been used obviously many times (a few patches and oil stains), this bag has held up great for me. I have taken it to the Uinta Mountains, Gannet Peak, Ranier (camping at Schurman), Granite Peak, Glacier Peak, loads of snow-camping backcountry ski tours, etc. The only time I was chilly in this bag was camping in the Baker backcountry earlier this winter when the temp likely fell to 13-15 degrees F with a breeze, and I was in a tent without a rain cover on. Only complaint: There is no neck baffle in this bag. I don't know if it's just my model that does not have this, or if it is sacrificed to save weight, but it is sorely missed at times. Long story short: If you have a thinner, more athletic frame and use a solid pad with a 5+ R-value, you can take this thing anywhere 20 degrees and above. For most times and places in the Cascades, this bag does the trick.

  • Fit Runs SnugVery Roomy
  • Warmth Not WarmExtremely Warm
  • How would you rate the quality? Not greatExcellent
Bill H.
United States United States

What a great sleeping bag

I have 7 sleeping bags acquired over 50 years of backpacking and the Hummingbird is finest. The construction is top quality. Unlike the zipper on my other bags, this zipper is a really good design and it does not snag. My first trip was hiking the Big Bend Outer Mountain Loop with the temperature down to 11F and I was comfy (with clothes on since I sleep cold).

Etienne O.
United States United States

Almost perfect! but earns 5 stars anyways

For reference ai am 5’-6” 150 lbs. athletic build. Literally just came back from a backpacking trip to Wayne National Forest where temperatures went down to low 30˚. I tend to sleep on the hot side so only wearing base layers but was kept nice and toasty in the Hummingbird 30. No complaints in the warmth department. Space was enough for someone my stature to allow for movement and turns as I do often change my position during sleep. Packs down as small as my pillow taking little space in the backpack and weight next to nothing as well. Overall, I am extremely happy with the Hummingbird 30, but only wish it had a pocket inside to keep my phone warm when temps hit below freezing as they did this past weekend.

Feathered Friends Hummingbird UL 20/30 Sleeping Bag ReviewFeathered Friends Hummingbird UL 20/30 Sleeping Bag Review
Gabriel V.
United States United States

Just incredible! Perfect 3 season bag!

It’s my first 950+ FP bag, it just packs down to nothing. Everything now fits in a 20L backpack for a weekend hike. And it’s warmer than I thought. I think it’s a perfect 3 season bag! I read that it can be snug, but for me it fitted just right. I'm 172 cm ~ 5′8″, 72kg ~ 159lbs.

  • How would you rate the quality? Not greatExcellent
  • How is the warmth? Not WarmExtremely Warm
  • How is the fit of the sleeping bag? Runs SnugVery Roomy
Feathered Friends Hummingbird UL 20/30 Sleeping Bag ReviewFeathered Friends Hummingbird UL 20/30 Sleeping Bag Review
Porter E.
United States United States

Hummingbird 20

Really happy I picked this over the roomier swallow, just the right amount of room for me with a bit left over for layering (140lbs 5’8”) The quality of construction and materials is without fault, my only criticisms are minor in the hope FF further improves this fabulous bag. The zipper plow does does do a good job preventing fabric snags, but it’s slow and a bit clunky to operate. I prefer the oversized dual fabric stiffeners running the length of the zipper on WM bags as a snagging solution, paired with a smooth operating standard slider. Arguably a 20 degree bag ought to have a proper draft collar. There really is none whatsoever on this bag, so when you need it to perform at its warmest it’ll mean cranking down the hood tight around the face. Personally I’m happy with none, knowing that I can add an insulated jacket for easier comfort when nearing the bags lower limit. When temps are regularly below freezing I’m switching to a warmer bag anyway. But for folks wishing to use this bag below freezing without the help of an insulated jacket, I would recommend considering alternatives with a real draft collar. Lastly, I wish FF would offer at least three length options. 5’10”, 6’2”, and 6’6” I think would make a lot of people happy with a more accurate fit. Overall a lovely bag I look forward to using for many years, thanks feathered friends!