Feathered Friends

Lark 10 YF Sleeping Bag - Muscovy Down

Lark 10 YF Sleeping Bag - Muscovy Down - Main image
$387.93 $599 In stock

Category: Three Season Bags

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 three-season bag that packs remarkably small while maintaining room to sleep comfortably. Filled with premium 900+ fill power Muscovy down, the Lark YF represents an excellent option for those who sleep on the cold side or push their adventures well into the colder evenings of spring and fall.

Our YF line of sleeping bags feature a lightweight, 100% nylon Pertex® Quantum® shell that uses yarns with unique Y-shaped filaments to create a fabric with increased downproofing and water beading properties, even after years of use and washing.

YF: YFuse. Pertex Quantum® 20 denier mini-ripstop fabric

Details

  • 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
  • Includes storage bag & stuff sack

Specs

Ideal Sleeper Height Reg 6' 0" / 183 cm
Long 6' 6" / 198 cm
Dimensions 59" shoulder / 64" elbow / 55" hip / 42" footbox
Zipper Left Side, YKK #5
Shell Pertex® YFuse®
Lining 20d 37g/m² nylon taffeta made from NetPlus® post-consumer recycled nylon.

NetPlus® helps reduce ocean plastic pollution by incentivizing fishing communities to turn in end-of-life nets for recycling before potentially ending up in the environment.  
Fill Power 900+ Fill Power Ultrasonic Muscovy Down or 900+ Fill Power Goose Down
Origin Made in Seattle, USA of imported materials
Temp Rating 10ºF / -12.2ºC
Fill Weight Reg 1 lb 4 oz / 568 g 
Long 1 lb 5.2 oz / 600 g
Average Weight Reg 2 lb 1.4 oz / 946 g 
Long 2 lb 3.5 oz / 1005 g
Packed Size 11L
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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.4 / 5 · 5 reviews)

Joshua L. ★★★★★

I was skeptical about packing bulk, but this 20-degree bag compresses way smaller than my old one. The extra down in the collar really locks in heat on chilly nights.

Samuel B. ★★★★★

That full collar made all the difference on a windy night—kept the drafts out completely. Packs down impressively small for a twenty-degree bag, which freed up space in my pack for extra gear.

Sebastian U. ★★★★★

Finally got out for a test night in the high 30s—the full collar made a huge difference keeping drafts out, and the down pack down impressively small for a 20 degree bag.