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$609.00
52 reviews


Due to high demand, Feathered Friends sleeping bags take approximately two to three weeks to complete. Please view our Shipping information here.

Once we receive your order, we will finish hand-crafting your sleeping bag right here in Seattle!

If you have an urgent deadline, do not hesitate to contact us.

*Sleeping bags may take up to two weeks to ship. Please check our Shipping Info page for more details. Thanks!*

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.

Looking for the Merlin 30 UL? You're in the right place! The Merlin 30 has been renamed the Hummingbird 30.

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 52 Reviews
5 ★
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Filter Reviews:
Vinnie F.
United States United States

Best Bag!

I've owned this bag for about 2 years now and it's incredible. I use it mostly for motorcycle camping and backpacking. I use the size XS Sea to Summit eVent compression dry bag and it compresses down to a little larger than a softball in my pack and then fluffs up pretty quickly when I pull it out in my tent. Wearing just a pair of compressions style long johns I can sleep comfortably down to about 30 degrees and with an added sweater and a pair of socks down into the 20's. This is paired with an uninsulated inflatable sleeping pad. I do have another 0 degree rated bag if I am going camping in the snow but it is much larger when it's packed down. This bag is also great on warmer night to leave unzipped as more of a blanket and it's not too warm. My only real complaint is that I wish it had some sort of a collar flap around the opening to help keep out some of the draft around your neck on colder nights. No matter how long of a day you've had it really hard to crawl inside of this bag not smile as you zip it up around yourself!! :)

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

Cozy and almost perfect

I got this bag for some cold weather hiking on the PCT, and it worked very well. Temps got down in the low 30s, and I was cozy and warm in the bag, paired with a Thermarest X-therm pad. I agree with others who have called out the zipper design, which is excellent, and works very well without jamming. There’s an integrated stuffed roll all along the zipper that lies over it when closed so there’s no heat loss there. The bag is also very light and packs down quite small by stuffing it into the bottom of my backpack. I didn’t get a compression sack for it. I’m a little over 5’-7”, so I ordered the 6 ft model, since I worried the 5’-6” version would be too short. Unfortunately there’s a bit too much air space down around my feet, and oddly not quite enough around the middle where I need room for my arms. I’m also not crazy about the cinch cord around the face opening. I tried it with a small pillow inside, and also with no pillow inside, and I found it hard to get a good seal around my face without feeling choked, it tends to leave gaps on the sides, but these are quibbles really. It’s a great quality bag and it kept me warm and cozy at night. Sleeping in cold weather with a bag like this is no problem, it’s getting OUT of the bag in the morning that’s the problem! BRRR! Thanks, Feathered Friends.

  • How is the fit of the sleeping bag? Runs SnugVery Roomy
  • How is the warmth? Not WarmExtremely Warm
  • How would you rate the quality? Not greatExcellent
Brooks T.
United States United States

As good as it gets!

Feathered Friends was the first store I visited when I moved to Seattle in 2009. The quality and care that is put into the design and delivery of these bags was shared with me and I knew one of these bags had to be mine. Years ago I got a 20 degree Swallow and recently this 30 degree hummingbird. I can say, without a doubt, that this bag is amazing. It packs down very well, re-lofts very quickly, and definitely holds a true and accurate temperature rating. I recently took this bag down to 34 degrees with a light shirt and a hat and was toasty all night. Between the superior product and the amazing service, I couldn't recommend FF more! But this bag- you wont regret it!

  • How is the fit of the sleeping bag? Runs SnugVery Roomy
  • How is the warmth? Not WarmExtremely Warm
  • How would you rate the quality? Not greatExcellent
Ofek S.
South Africa South Africa

Best sleeping bag in the world

I love it! Very comfy and light weight. I am a slender 1.71 meters guy and it feels exactly the size for me. Nit too roomy and not too snug. As an example, I can't sit inside with my legs crossed baut I am allmost there a bigger sleeping bag would be an overkill gir me.

  • How is the fit of the sleeping bag? Runs SnugVery Roomy
  • How is the warmth? Not WarmExtremely Warm
  • How would you rate the quality? Not greatExcellent
Czechia Czechia

Ridiculously puffy

This is a great sleeping bag, and clearly a step above what around 400/500 gets you in REI. It is very very warm, warmer than the rating would suggest. It’s the puffiest bag I’ve had. I’d probably go for the 30 instead of the 20 if I was to do it again. I run cold and the 20 is too warm as a three seasons bag. It is very light, but the size may give you some trouble if trying to UL with a 40L pack. I have the hummingbird, I’m a pretty slim guy and find the bag plenty roomy even for side sleeping.

  • How is the fit of the sleeping bag? Runs SnugVery Roomy
  • How is the warmth? Not WarmExtremely Warm
  • How would you rate the quality? Not greatExcellent