Swift UL 20/30 Sleeping Bag

$438.48 ~~$689~~ In stock

New for Winter 2025/2026: The Swift UL gets all-new Pertex® Quantum Pro® shell fabric + Pertex® Diamond Fuse lining fabric in the footbox, plus new and familiar colors

The widest of our 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. With lighter Pertex® Endurance® UL fabric and ultra lofty 950+ fill power down, this is the ultimate in space without the weight.

Available in 20 Degree and 30 Degree options.

UL: Ultralight. Pertex® Quantum Pro® water-resistant/breathable fabric with 950+ Fill Power Down

Details

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
Pertex® Diamond Fuse 15 denier footbox lining that offers more abrasion protection for more nights at camp
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	61" shoulder / 68" elbow / 57" hip / 44" footbox
Zipper	Left Side
Shell	Pertex® Quantum Pro® 7 denier + 30 denier ripstop weave The durable water repellent (DWR) finish on our Swallow UL Sleeping Bags is made without intentionally added perfluorinated chemicals (PFCs/PFAS)
Lining	Flyte 10 denier recycled nylon + Pertex® Diamond Fuse 15 denier footbox
Fill Power	950+ Goose Down
Origin	Made in Seattle, USA of imported materials

Temp Rating	20ºF / -6.67ºC	30ºF / -1.1ºC
Fill Weight	Reg 1 lb 2.7 oz / 529 g Long 1 lb 3.8 oz / 561 g	Reg 15.4 oz / 438 g Long 1 lb 0.6 oz / 470 g
Average Weight	Reg 1 lb 13 oz / 823 g Long 1 lb 14.7 oz / 869 g	Reg 1 lb 9.8 oz / 732 g Long 1 lb 11.5 oz / 779 g
Packed Size	9L	9L

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Express Shipping · United States: $3.99

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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 (4.0 / 5 · 5 reviews)

Scarlett ★★★★★ Oct 22, 2026

I’ve been using it for two weeks in the high 30s and the new Pertex Quantum Pro shell kept me perfectly dry through a few light drizzles. The extra width in the mummy cut is a game-changer for side sleepers like me.

Daniel ★★★★☆ Oct 20, 2026

Took it out for a chilly weekend and the wider mummy cut made a real difference—no more feeling like a sardine when I roll over. The new Pertex Diamond Fuse lining in the footbox kept my toes warm without any extra bulk, and the shell shed a light drizzle easily. Only wish the stuff sack had a bit m

Adam X. ★★★★☆ Oct 19, 2026

The Pertex Quantum Pro shell feels tough enough for brushy campsites, and I love that the footbox lining is a different fabric to reduce wear. Just wish the stuff sack had a compression strap to fit it smaller in my pack; it’s still a solid four-season bag for mild trips.