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ThermaRest Questar 0F / -18C Sleeping Bag

ThermaRest Questar 0F / -18C Sleeping Bag

Regular price $595.95 CAD
Regular price Sale price $595.95 CAD
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Packed with features needed for cold-weather camping, the Questar™ offers supreme comfort and versatility.

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.

The 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.


* 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: Integrate the bag with a pad for optimal efficiency and comfort; removable for versatility.

* 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.

Heat-trapping draft collar. Full-length zipper draft tube.

Snag-free zipper.

Cinchable hood and external zip pocket.


Colour: Balsam
Packed dimension (Standard): 8 x 10
Packed dimension (Metric): 20 x 25
EN Comfort (C): -10 C
EN Comfort (F): 14 F
EN Limit (C): -18 C
EN Limit (F): 0 F
Recommended Temperature Comfort (F): 14
Recommended Temperature Comfort (C): -10
Recommended Temperature Limit (F): 0
Recommended Temperature Limit (C): -18
Fill material: 650 Fill Duck Nikwax Hydrophobic Down RDS
Fill weight (Standard): 1 lbs 10 oz
Fill weight (Metric): 0.75 kg
Shell fabric: 20D Polyester w/ DWR
Lining fabric: 20D Polyester Taffeta

Weight (Standard): (S): 2 lbs 9 oz / (Reg):2 lbs 11 oz / (L):3 lbs 1 oz
Weight (Metric): (S): 1.17 kg / (Reg):1.21 kg / (L):1.38 kg
Width (Standard): (S): 29 in / (Reg):31.5 in / (L):33 in
Length (Standard): (S): 73 in / (Reg):80 in / (L):85 in
Height (Standard): (S): 5.5 in / (Reg):5.5 in / (L):5.5 in
Fits (Standard): (S): 66 in / (Reg):72 in / (L):78 in
Fits (Metric): (S): 168 cm / (Reg):183 cm / (L):198 cm
Girth, Shoulder (Standard): (S): 58 in / (Reg):63 in / (L):66 in
Girth, Shoulder (Metric): (S): 147 cm / (Reg):160 cm / (L):168 cm
Girth, Hip (Standard): (S): 58 in / (Reg):61 in / (L):64 in
Girth, Hip (Metric): (S): 147 cm / (Reg):155 cm / (L):163 cm
Girth, Foot box (Standard): (S): 44 in / (Reg):46 in / (L):51 in
Girth, Foot box (Metric): (S): 112 cm / (Reg):117 cm / (L):130 cm

What's Included

ThermaRest Questar 0F / -18C Sleeping Bag
Compression sack and storage sack


Better Sleep Guarantee
All Therm-a-Rest sleeping bags and quilts are also covered by our Better Sleep Guarantee. When you wake up on a Therm-a-Rest sleeping bag or quilt, we're confident you'll wake up feeling better than ever. If you are not completely satisfied, return it within three months with the original receipt of purchase and ThermaRest will give you a full refund- no questions asked.

Limited Lifetime Warranty
Every piece of Therm-a-Rest gear is designed to endure the rigors of your time in the backcountry. ThermaRest offers a Limited Lifetime Warranty on all products, except electronic devices, which have a 2-year Limited Warranty.

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