Questar™ 0F/-18C Sleeping Bag

  • Therm-a-Rest® Questar™ Sleeping Bag - Balsam - Regular
  • Therm-a-Rest® Questar™ Sleeping Bag - Balsam - Regular
  • Therm-a-Rest® Questar™ Sleeping Bag
  • Therm-a-Rest® Questar™ Sleeping Bag - SynergyLink™ Connectors
  • Therm-a-Rest® Questar™ Sleeping Bag - SynergyLink™ Connectors
  • Therm-a-Rest® Questar™ Sleeping Bag - Stuff Sack
  • Therm-a-Rest® Questar™ Sleeping Bag
  • Therm-a-Rest® Questar™ Sleeping Bag
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Therm-a-Rest

Questar™ 0F/-18C Sleeping Bag

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Size Chart
Packed with features needed for cold-weather camping, the Questar™ offers supreme comfort and versatility.
  • 650 fill Nikwax Hydrophobic Down™: Absorbs 90% less water and dries 3 times faster without using dangerous PFCs.
  • W.A.R.M. Fit: With Additional Room for Multiple positions (W.A.R.M.) fit means this bag allows for various natural sleep positions while maintaining thermal efficiency.
  • SynergyLink™ Connectors: Removeable ultralight straps create a secure bag-to-sleeping pad connection that optimizes the comfort and thermal efficiency of your entire sleep system. SynergyLink Connectors function best with regular sized sleeping pads that are 3 inches thick or less when inflated.
  • Zoned Insulation: Maximizes warmth and saves weight by intentionally placing fill where you need it most.
  • Box Baffled Construction: Uses mesh walls to maximize loft and minimize cold spots.
  • Toe-asis™ Foot Warmer Pocket: Ergonomic toe box that rapidly warms cold feet in a pocket of warm down.
  • Quilt and Blanket Loops: Customize your sleep system by layering our quilts or tech blankets for increased warmth.
  • Responsible Down Standard Certified: Certification that ensures that the waterfowl in the down supply chain are treated humanely.
  • Additional features: Heat-trapping draft collar, full-length zipper draft tube, snag-free zipper, cinchable hood and external zip pocket.
  • Compression sack and storage sack included
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Description

When you need feature-packed comfort for frigid backcountry conditions, it’s time to pack the Questar 0F/-18C. We've loaded this bag with the comfort features that Therm-a-Rest bags are known for. Our SynergyLink™ Connectors integrate the bag with your sleeping pad while allowing our Zoned Insulation to keep fill where you need it most. The fit of the bag has been perfected in our onsite cold chamber to create our W.A.R.M. fit that allows room for multiple sleep positions without compromising thermal efficiency. Stuffed with water-resistant 650 fill Nikwax Hydrophobic Down certified by the Responsible Down Standard, the four-season Questar is ready for your next backcountry adventure. The Questar is offered in three sizes, and designed to fit both men and women. Compression sack and storage sack included.

Tech Specs

Small Regular Long
SKU 13158 13159 13160
Color Balsam Balsam Balsam
Weight (Standard) 2 lb 9 oz 2 lb 11 oz 3 lb 1 oz
Weight (Metric) 1.17 kg 1.21 kg 1.38 kg
Width (Standard) 29 in 31.5 in 33 in
Length (Standard) 73 in 80 in 85 in
Height (Standard) 5.5 in 5.5 in 5.5 in
Fits (Standard) 66 in 72 in 78 in
Fits (Metric) 168 cm 183 cm 198 cm
Girth Shoulder (Standard) 58 in 63 in 66 in
Girth Shoulder (Metric) 147 cm 160 cm 168 cm
Girth Hip (Standard) 58 in 61 in 64 in
Girth Hip (Metric) 147 cm 155 cm 163 cm
Girth Foot box (Standard) 44 in 46 in 51 in
Girth Foot box (Metric) 112 cm 117 cm 130 cm
Packed dimension (Standard) 8 x 10 8 x 10 8 x 10
Packed dimension (Metric) 20 x 25 20 x 25 20 x 25
Recommended Temperature Comfort (F) 14 14 14
Recommended Temperature Comfort (C) -10 -10 -10
Recommended Temperature Limit (F) 0 0 0
Recommended Temperature Limit (C) -18 -18 -18
Fill material 650 Fill Duck Nikwax Hydrophobic Down RDS 650 Fill Duck Nikwax Hydrophobic Down RDS 650 Fill Nikwax Hydrophobic Down RDS
Fill weight (Standard) 1 lb 10 oz 1 lb 13 oz 1 lb 15 oz
Fill weight (Metric) 0.75 kg 0.82 kg 0.89 kg
Shell fabric 20D Polyester w/ DWR 20D Polyester w/ DWR 20D Polyester w/ DWR
Lining fabric 20D Polyester Taffeta 20D Polyester Taffeta 20D Polyester Taffeta
Country of Origin Made in China Made in China Made in China

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Limited Lifetime Warranty

Every piece of Therm-a-Rest gear is designed to endure the rigors of your time in the backcountry. We offer a Limited Lifetime Warranty on all products, except electronic devices, which have a 2-year Limited Warranty. Visit our Therm-a-Rest warranty page for more info.

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Overall rating: 4.5333333 / 5 from 15 reviews.

AI Generated Review Summary

Summary topics

Review topics: ["bag","rating","temps","line"].

Review highlights

Reviews

Nicely manufactured

"Nicely manufactured"

— Ken Y. (5/5)

I love it.

"I love it."

— Shawn F. (5/5)

We have an older Questar

"We have an older Questar and the new zipper design makes it easier to zip and unzip without snagging the bag. Still as warm as the old one. Temp rating is about right. Used it down to the single digits without feeling cold wearing fleece underwear."

— Keith S. (5/5)

Comfortable and warm

"Plenty of space to move around and decently warm (I've used it only up to 7C). Not sure it will handle when I go to the arctic this summer, but I'm hopeful! Packs down super small and is also light. Only wish the blue was the outside colour instead of the green!"

— April M. (5/5)

Nice and cozy

"This bag has kept me nice and cozy through some chilly PNW nights. Overnight temperatures in the Pacific Northwest in fall, winter, and spring rarely dip below freezing. I have used this bag in the mid 30s and it has kept me warm. I am usually cold when sleeping so I use a bag with a lower rating than the outside temperature."

— John W. (5/5)

Good

"I had used this bag for an overnight in the Pinchot State Forest in PA. The lowest temperature was 20F with some wind chill that brought it near the bags labeled comfort rating of 15F. I used a MSR Access 1 tent (winter rated). My sleep pad system was the NeoAir XTherm Sleeping Pad (R 6.9) combined with a Z Lite SOL Sleeping Pad (R 2.0), which provided a robust R 8.9. This sleeping pad system coupled with a 0F extreme rating should have proved sufficient. However, in spite of the aforementioned system and wearing merino wool base layer (socks, pants, shirt, and face covering), I woke up at 2am shivering. Good thing I brought with me a winter sleeping bag insert. Once deployed, I never slept better. While it advertises the ability “roll around” for those restless sleepers, which it did, it did have some consequences - the snap and zipper would always come undone and cinch hole would cover mouth. These issues were enhanced by the sleeping pad straps, which ironically allowed for the movement. Overall, if used wisely with appropriate gear, this bag is sufficient and comfortable. Do I regret this purchase - NO! I happy to have this in my backpacking arsenal."

— Michael K. (4/5)

Really great design but just not that warm for its rating

"I bought this bag to replace an older 0 degree sleeping bag that I have. My old bag has seen over 200 nights of use and has lost a lot of down and loft, so I was looking for a new bag to replace it. Long story short, after trying out this questar bag backpacking, to me it actually felt less warm than my very used old 0 degree bag. I’m a very cold sleeper so when it’s 20 degrees out I still sleep in long johns and a down jacket and pants in my bag, but despite that with this bag I was still cold. Ultimately warmth feels like the absolute top priority in a bag and I don’t feel like this bag met that requirement. That being said I loved: -how light it is - the straps to secure it to the sleeping pad - the non-stick zipper - the baffles around the neck to keep warm air from getting out - how soft the bag feels - that you get a large storage stuff sack along with the compression stuff sack that you can use to store the bag properly at home So yeah overall I’d say really great design it just seems like it could use some more down. Maybe my old 0 degree bag was exceptionally warm and was not a good benchmark, but compared to that bag, this questar was not as warm."

— Ryan G. (3/5)

Good but definatley room for more feathers.

"Seems good enough. I appreciate the complete abscence of pfc's and the sexy nearly od colour. I would like to se some overfilling of this bag scince i definatley feel spots without feathers in the top middle layers. My scales say 1,78 kg wich is aproximately 1,8 kg as stated on the website. Definately beefy hood and footbox."

— Andrew (3/5)

Génial

"Après beaucoup d'essais de sacs, j'ai trouvé le top : confort en largeur et longueur,douceur, chaleur, légèreté...un vrai bonheur"

— Martinoty (5/5)

Warm

"Very warm and roomy. I wish it had the ability to open to toe box to increase ventilation on those "warmer", 40 degree nights."

— Alex (4/5)

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