Lark UL 10 Sleeping Bag
New for Winter 2025/2026: Our Lark 10 UL gets all-new Pertex® Quantum Pro® shell fabric + Pertex® Diamond Fuse lining fabric in the footbox, plus new and familiar colors
We made a favorite even warmer. The Lark is a rock-solid three-season sleeping bag built for comfort and performance when the nights turn cold. With a full down collar, additional fill, and premium 950+ fill power down, it delivers exceptional warmth while still packing down surprisingly small. A great choice for those who sleep on the cold side or venture deep into the shoulder seasons of spring and fall.
UL: Ultralight. Pertex® Quantum Pro® water-resistant/breathable fabric with 950+ Fill Power Down
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
- 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
Additional Info
| 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® 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 | 10ºF / -12.2ºC |
|---|---|
| Fill Weight |
Reg 1 lb 4 oz / 568 g Long 1 lb 5.2 oz / 600 g |
| Average Weight |
Reg 1 lb 14.9 oz / 877 g Long 2 lb 0.6 oz / 924 g |
| Packed Size | 11L |
Original: $709.00
-65%$709.00
$248.15Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
New for Winter 2025/2026: Our Lark 10 UL gets all-new Pertex® Quantum Pro® shell fabric + Pertex® Diamond Fuse lining fabric in the footbox, plus new and familiar colors
We made a favorite even warmer. The Lark is a rock-solid three-season sleeping bag built for comfort and performance when the nights turn cold. With a full down collar, additional fill, and premium 950+ fill power down, it delivers exceptional warmth while still packing down surprisingly small. A great choice for those who sleep on the cold side or venture deep into the shoulder seasons of spring and fall.
UL: Ultralight. Pertex® Quantum Pro® water-resistant/breathable fabric with 950+ Fill Power Down
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
- 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
Additional Info
| 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® 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 | 10ºF / -12.2ºC |
|---|---|
| Fill Weight |
Reg 1 lb 4 oz / 568 g Long 1 lb 5.2 oz / 600 g |
| Average Weight |
Reg 1 lb 14.9 oz / 877 g Long 2 lb 0.6 oz / 924 g |
| Packed Size | 11L |
