Swift Nano 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. Thanks to the exceptionally warm and light 900+ fill down, the bag also packs efficiently so it can easily go on all of your adventures.

Nano: Schoeller® NanoSphere 20 denier water-resistant/ breathable fabric.
Sign up to get notified when this product is back in stock

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
  • Overlapping dual-webbing zip guard guides the fabric away from the zipper and eliminates the need for a stiff or heavy fabric layer that can interfere with the draft tube seal
  • 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 900+ Goose Down
Fill Weight Reg 18.8 oz / 533 g
Long 19.7 oz / 558
Lining Fabric Pertex® 30 denier nylon taffeta
Country of Origin Made in Seattle, USA of imported materials
Packed Size 7" x 12" | 9L
Average Weight Reg 2 lb 1 oz / 942 g
Long 2 lb 3 oz / 997 g
Sleeping Bag Shell Fabric Schoeller Nanosphere®
Temperature Rating 20ºF / -6.67ºC
Zip Side Left

Customer Reviews (1)

This Bag is Bitchin’ Kit!Review by TheOtherDave
After visiting the Seattle retail store this September (highly recommend visiting, BTW and it’s just down the street from REI’s main store which you will also want to see) and picked up this Swift Nano and a Puffin Nano for my Fiancé. I have wanted one of these bags for a really long time and had always heard they were best of the best. I live in Michigan and spend a lot of time in winter weather, both outdoors and in my off grid cabin-I am not a cold sleeper by any stretch so let’s get that out of the way..... this I the first time I have ever slept in a bag at it’s rated temperature (20 deg. In this case) and was warm and comfortable. I’m really glad to have my/our bags and am really impressed with the quality construction. I could wish for a heavier duty zipper, but I guess that isn’t an option becasue it makes the gear weight Nazis break into hives. Either way, the standard zipper seems up to the job. I really like that the waterproofing is permanent to the fabric and never needs to be reapplied, water runs off of my bag like it is allergic to it.

In all, I’m really happy to have the bag and would replace it and it’s sister bag if anything happened to either of them. (Posted on 12/18/2017)

Write Your Own Review

You're reviewing: Swift Nano 20 Sleeping Bag