Lark UL 10 Sleeping Bag

We made a favorite even warmer. Take our most popular 20 degree model, the Swallow, add a full collar and additional fill and you have a rock-solid 3-season bag that packs remarkably small while maintaining room to sleep comfortably. The Lark represents an excellent option for those that tend to sleep on the cold side or push their adventures well into the colder evenings of spring and fall.

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

Availability: Select color & length for availability

Availability Information

From: $549.00

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  • Mummy shape (average width) with #5 YKK two-way, separating zipper with locking sliders
  • Full collar provides an effective seal 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 standard-width mummy sleeping bags are ideal for most people - a balance of space without too much excess.

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 60" / 56" / 38"
Fill Power 950+ Goose Down
Fill Weight Reg 20 oz / 567 g
Long 21.2 oz / 601 g
Lining Fabric Flite 15 denier ripstop nylon
Country of Origin Made in Seattle, USA of imported materials
Packed Size 7" x 14" | 11L
Average Weight Reg 2 lb 0 oz / 913 g
Long 2 lb 2 oz / 971 g
Sleeping Bag Shell Fabric Pertex® Endurance UL
Temperature Rating 10ºF / -12.2ºC
Zip Side Left

Customer Reviews (2)

Lark LT - very warm and comfyReview by Jay
I just got the bag. They did a great job working with me on finding the best bag and materials. And the bag was so comfortable while camping out on a chilly night in the Idaho desert. This bag replaces my other Feathered Friends Swallow bag that I've had for 22 years. I'm looking forward to 22 more years with the LarkLT and I don't think I'll be disappointed. (Posted on 4/15/2014)
This is the best bag I've had in all my 50 years of backpacking. It's light, warm at low temps and even into the moderate highs of summer. The Pertex Endurance shell fabric sheds water like a duck, and the dark colors help this bag to absorb heat and conceal the inevitable stains and dirt. The Lark UL has become my goto bag for every outdoor adventure.
(Posted on 8/20/2013)

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