Comparison: Best Thermarest Blow Up Bag (Updated | Oct 27th)
When exploring the best Therm-a-Rest blow-up bags for camping or travel, finding a balance between comfort, portability, and durability is key. This comparison highlights popular models, evaluating factors like insulation, ease of inflation, and packability to help you choose the option that aligns with your needs. Whether prioritizing lightweight design or plush support, our neutral overview aims to simplify your decision-making process without bias or exaggeration.
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Editor’s Choice
Best for a specific purpose
-
Best for best overall:
Therm-a-Rest Questar 32F/0C Lightweight Down Mummy Sleeping Bag -
Best for cold weather:
Therm-a-Rest Saros 20F/-6C Synthetic Mummy Sleeping Bag -
Best for ultra lightweight:
Therm-a-Rest Hyperion 32F/0C Ultralight Down Mummy Sleeping Bag -
Best for accessory only:
THERMAREST 30002 Z Light Sol Mat Case -
Best for editors choice:
Therm-a-Rest Boost 650 32F/0C Down Sleeping Bag -
Best for wide fit:
Therm-a-Rest Boost 650 20F/-6C Down Sleeping Bag -
Best for best value:
Therm-a-Rest Space Cowboy 45F/7C Synthetic Mummy Sleeping Bag -
Best for synthetic warmth:
Therm-a-Rest Saros 32F/0C Synthetic Mummy Sleeping Bag -
Best for budget pick:
Coleman Dunnock 20°F Big ‘n Tall Sleeping Bag -
Best for premium eco:
Therm-a-Rest Parsec 32F/0C Ultralight Down Mummy Sleeping Bag
Product Comparison: Best Thermarest Blow Up Bag
Best overall
Therm-a-Rest Questar 32F/0C Lightweight Down Mummy Sleeping Bag, Regular, Balsam
Therm-a-Rest
- The lightest in the award-winning Questar line, this bag blends comfort features with a backcountry-friendly packed size for three-season camping
- 650 fill Nikwax Hydrophobic Down absorbs 90% less water and dries 3 times faster without using dangerous PFCs
- With Additional Room for Multiple positions (W.A.R.M.) fit means it allows for various natural sleep positions while maintaining thermal efficiency
- SynergyLink Connectors integrate the bag with a pad for optimal efficiency and comfort; zoned Insulation maximizes warmth and saves weight
- Regular left-zip bag measures 80×31.5×4 inches, fits heights up to 6 feet, packs to 6.5×8.5 inches, and weighs 1.88 pounds; storage sack and compression sack included
Cold weather
Therm-a-Rest Saros 20F/-6C Synthetic Mummy Sleeping Bag, Long, Stargazer
Therm-a-Rest
- Therm-a-Rest’s top-rated Saros 20F/-6C synthetic sleeping bag offers lightweight warmth for three-season comfort while camping and backpacking
- EraLoft synthetic fill insulation is efficient, compressible and water-resistant using hollow fibers to reduce weight without sacrificing warmth
- With Additional Room for Multiple positions (W.A.R.M.) fit means it allows for various natural sleep positions while maintaining thermal efficiency
- SynergyLink Connectors integrate the bag with a pad for optimal efficiency and comfort; Zoned Insulation maximizes warmth and saves weight
- Long measures 85x33x4.5 inches, fits heights up to 6 feet 6 inches, packs to 9.5×10.5 inches, and weighs 3.56 pounds; storage sack and compression sack included
Ultra lightweight
Therm-a-Rest Hyperion 32F/0C Ultralight Down Mummy Sleeping Bag, Long, Black Forest
Therm-a-Rest
- Ultralight, packable 32-degree mummy sleeping bag for three-season camping and backpacking provides peak performance for uncompromising adventurers
- This feather-light sleeping bag weighs a mere 18 ounces; lightweight materials and precise design allow for an extremely small packed size
- 900-fill Nikwax Hydrophobic Down stays drier and maintains loft 60 x longer than untreated down; box baffle maximizes loft and minimizes cold spots
- Ergonomic shape and longer zipper provide a comfortable fit; SynergyLink Connectors integrate the bag with a mattress for efficiency and comfort
- Long size fits heights up to six feet six inches, weighs 18 ounces and packs down to 5.5 x 6 inches; storage sack and compression stuff sack included
Accessory only
THERMAREST 30002 Z Light Sol Mat Case, Stuff Sack, Regular Size Only
Therm-a-Rest
- Compatible Mattress: Z Light Regular (Part # 30302), Z Light Sol Regular (Part # 30670)
- Country of Origin: China
Editors choice
Therm-a-Rest Boost 650 32F/0C Down Sleeping Bag, Regular Wide
Therm-a-Rest
- Built for everybody and bodies of all shapes and sizes, the Boost 650 is an ultra-comfortable backpacking sleeping bag with adjustable shape and warmth
- WarmZip Tech is our patent-pending center zipper that can reduce the bag's internal space and tuck insulation around the sleeper to boost warmth by up to 10 degrees F (6 degrees C)
- An inclusive size range that includes Wide sizes for every length, as well as the centered WarmZip zipper, increases comfort for people with broad shoulders, those who toss and turn, and everyone who wants more room than a traditional mummy sleeping bag
- Multi-use arm holes make it easy to reach the WarmZip, read, make coffee, or play cards all while keeping warmth in and cold out
- 650 fill, RDS-certified down is hydrophobic to help keep you dry in inclement weather and is allocated to key areas for maximum heat efficiency and comfort
- Shell and liner are made with 100% recycled nylon that is soft to the touch and uses a PFAS-free DWR to further reduce the sleeping bag's environmental impact
- Regular Wide size sleeping bag weighs 2 lbs 8 oz (1.12 kg) and measures 80 x 38 in (203 x 96.5 cm). Packs down to 13.5 x 7.5 in (34 x 19 cm). Includes storage bag and compression stuff sack
Wide fit
Therm-a-Rest Boost 650 20F/-6C Down Sleeping Bag, Large
Therm-a-Rest
- Built for everybody and bodies of all shapes and sizes, the Boost 650 is an ultra-comfortable backpacking sleeping bag with adjustable shape and warmth
- WarmZip Tech is our patent-pending center zipper that can reduce the bag's internal space and tuck insulation around the sleeper to boost warmth by up to 10 degrees F (6 degrees C)
- An inclusive size range that includes Wide sizes for every length, as well as the centered WarmZip zipper, increases comfort for people with broad shoulders, those who toss and turn, and everyone who wants more room than a traditional mummy sleeping bag
- Multi-use arm holes make it easy to reach the WarmZip, read, make coffee, or play cards all while keeping warmth in and cold out
- 650 fill, RDS-certified down is hydrophobic to help keep you dry in inclement weather and is allocated to key areas for maximum heat efficiency and comfort
- Shell and liner are made with 100% recycled nylon that is soft to the touch and uses a PFAS-free DWR to further reduce the sleeping bag's environmental impact
- Long size sleeping bag weighs 3 lbs 1 oz (1.40 kg) and measures 85 x 32.5 in (216 x 82.5 cm). Packs down to 13 x 7.5 in (33 x 19 cm). Includes storage bag and compression stuff sack
Best value
Therm-a-Rest Space Cowboy 45F/7C Synthetic Mummy Sleeping Bag, Regular, Celestial
Therm-a-Rest
- The Space Cowboy sleeping bag is the ideal choice for lightweight, versatile and hassle-free summer warmth
- EraLoft Insulation uses hollow fibers to trap air and boost warmth without added weight; dries fast and retains loft and warmth even when wet
- Shell and liner are made of a soft, lightweight, durable and GRS-certified 100% recycled nylon
- SynergyLink Connectors easily integrate with your pad to optimize the comfort and thermal efficiency of your sleep system
- Heat-mapped Zoned Insulation delivers an elite warmth-to-weight ratio by allocating insulation to where you need it and reducing it where you don't
- Anti-snag YKK zippers prevents accidental tears and ease entries and exits
Synthetic warmth
Therm-a-Rest Saros 32F/0C Synthetic Mummy Sleeping Bag, Regular, Stargazer
Therm-a-Rest
- The Saros 32F/0C is a warm, lightweight, and fully-featured synthetic sleeping bag offering three-season comfort while camping and backpacking
- EraLoft synthetic fill insulation is efficient, compressible and water-resistant using hollow fibers to reduce weight without sacrificing warmth
- With Additional Room for Multiple positions (W.A.R.M.) fit means it allows for various natural sleep positions while maintaining thermal efficiency
- SynergyLink Connectors integrate the bag with a pad for optimal efficiency and comfort; Zoned Insulation maximizes warmth and saves weight
- Regular measures 80×31.5×4 inches, fits heights up to 6 feet, packs down to 8.5×9.5 inches, and weighs 2.31 pounds; storage sack and compression sack included
Budget pick
Coleman Dunnock 20°F Big ‘n Tall Sleeping Bag, Cold-Weather Sleeping Bag Fits Adults up to 6ft 4in, Machine Washable, Flannel Liner
Coleman
- Adult sleeping bag designed to keep you cozy in temperatures as low as 20 degrees F
- Suitable for most people with heights up to 6 feet 4 inches tall
- Fiberlock construction with a cotton cover and soft cotton flannel liner for maximum warmth and comfort
- Thermolock draft tube prevents heat loss via the zipper to maintain ideal temperature
- Patented 2-way ZipPlow system avoids fabric snagging during zipping
- Roll Control design and Wrap 'N Roll integrated packing system for easy rolling and securing
- Unzips at the bottom for additional ventilation on warmer nights
- Machine washable for hassle-free cleaning
Premium eco
Therm-a-Rest Parsec 32F/0C Ultralight Down Mummy Sleeping Bag, Long, Larch
Therm-a-Rest
- The Parsec 32F/0C down sleeping bag keeps weight to a minimum for summer alpine adventures with exceptional comfort
- GRS-certified 100% recycled fabrics are eco-friendly while being lightweight, soft and durable; anti-snag YKK zipper ensures easy entries and exits and prevents tears
- PFC-free and RDS-certified 800-Fill Nikwax Hydrophobic Down absorbs 90% less water and dries 3x faster than untreated down
- Ultralight SynergyLink Connectors create a secure bag-to-sleeping pad connection that optimizes comfort and thermal efficiency of your entire sleep system
- Heat-mapped Zoned Insulation maximizes warmth and trims weight, putting down where you need it and reducing it where you don’t
- Toe-asis Foot Warmer is a baffled pocket of insulation that rapidly warms cold feet in our ergonomic footbox
- Quilt and blanket loops allow you to customize your sleep system by layering quilts or tech blankets for increased warmth
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Buying Guide
FAQs
What should I consider when choosing a Therm-a-Rest inflatable sleeping bag?
Focus on insulation type (synthetic vs. down), weight, packed size, temperature rating, and comfort features like padding or draft tubes. Ensure it suits your camping environment and season.
How does an inflatable sleeping bag differ from traditional sleeping bags?
Inflatable bags use air-insulated chambers for lightweight warmth and compactness. Traditional bags rely on fill material. Inflatable bags are easier to carry but may require practice to inflate properly.
What temperature rating should I look for?
Match the rating to your camping conditions: sub-30°F for winter, 30–50°F for spring/fall, and above 50°F for summer. Always prioritize a lower rating if unsure about weather changes.
Are inflatable sleeping bags easy to set up?
Yes, most models feature quick-inflation valves. Practice at home to master the technique. Avoid over-inflation to prevent stiffness and ensure even insulation.
How durable are Therm-a-Rest inflatable bags?
They use ripstop fabrics and reinforced seams for longevity. Avoid sharp objects and store deflated to prevent damage. Proper care extends their lifespan significantly.
Can I repair a punctured inflatable sleeping bag?
Yes, Therm-a-Rest offers repair kits. Small holes can be patched with adhesive patches. For larger damage, contact customer support or a specialized outdoor retailer.