Boost 650™ 20F/-6C Sleeping Bag
Boost 650™ 20F/-6C Sleeping Bag
Ultra-comfy three-season backpacking sleeping bag with adjustable shape and warmth.
- Customizable Comfort: Enjoy the spacious freedom of the semi-rectangular bag or the cozy warmth of a mummy bag—pick the shape and temperature that keeps you comfy at night with just a zip.
- Patent-pending center zipper design zips up to reduce the bag’s internal space and tuck insulation around the sleeper to boost warmth by up to 10F/6C.
- Multi-Use Arm Holes: Reach the WarmZip, read a book, play cards or simply ventilate—do it all while tucked into your sleeping bag for elevated livability.
- Plush & Puffy: 650-fill, hydrophobic down is allocated to key areas with for refined heat efficiency and maximum coziness.
- Eco-Conscious Materials: Shell and liner are made of GRS-certified, 100% recycled, soft-to-the-touch nylon and coated with PFAS-free water repellent.
- Inclusive Sizing: Each length—Short, Regular, Long—is also available in a Wide width, so you get the bag you want in the fit you need.
- Additional Features: YKK anti-snag zippers, cinchable hood, zipper draft tube, puffed draft collar, and a two-way entry zipper.
- What's Included:
✓ Compression Sack
✓ Storage Sack
Comfort is not ‘one size fits all’, which is why the Boost 650 empowers you to customize its shape to find your perfect balance of space and warmth. As a spacious semi-rectangular sleeping bag the Boost provides all the room you need to side sleep, shift about, spread out and relax. The semi-rectangular shape gives you considerably more internal space than a mummy bag—you’ll feel unrestricted and free to sleep in whatever position you want all night long. But more space demands more body heat to warm it up and cold isn’t comfortable. That’s where WarmZip comes in. Zipping up the WarmZip center zipper transforms the shape of the Boost 650 from a semi-rectangular bag to a thermally efficient mummy bag. It pulls the 650-fill down around your body and reduces the amount of space your body needs to heat. WarmZip gives you the power to add up to 10F/6C to the Boost’s temperature rating. Standard Therm-a-Rest features like a puffy draft collar, a draft tube along the entry zipper line and a cinchable hood round out the Boost’s bliss-inducing comfort.
We designed the Boost 650 to be comfortable when you’re falling asleep, when you’re asleep and when you’re wide awake and hanging out in your tent. The arm holes give you easy access to the WarmZip without having to use the side zipper. They also allow you to access your belongings, read a book, play cards or high-five your friends without leaving the cozy warmth of your sleeping bag. Getting too warm? Use the arm holes to ventilate or comfortably sleep with just your arms out. You can also ventilate around your torso or down by your feet with the two-way side zipper. Every zipper line on the Boost has a durable YKK anti-snag pull to eliminate annoying snags and damaging tears.
All that comfort must be bulky and heavy, right? Think again. The Boost 650 was built to backpack—we dialed in the materials and design to make it light, packable and high-performing in variable backcountry conditions. Zoned Insulation places the 650-fill hydrophobic down in key warmth-retention areas (on top, around your core and shoulders) and reduces it where it’s less efficient (on the bottom), allowing the Boost to create more warmth with less down. The shell and liner are made of 100%-recycled nylon that was handpicked for its light weight and super-soft feel. The PFAS-free DWR coating and the hydrophobic down keep the Boost warm and comfy even in wet weather.
Short | Short Wide | Regular | Regular Wide | Long | Long Wide | |
---|---|---|---|---|---|---|
SKU | 14201 | 14202 | 14203 | 14204 | 14205 | 14206 |
Color | Morning Blue | Morning Blue | Morning Blue | Morning Blue | Morning Blue | Morning Blue |
Weight (Standard) | 2 lb 4 oz | 2 lb 13 oz | 2 lb 11 oz | 3 lb 5 oz | 3 lb 1 oz | 3 lb 13 oz |
Weight (Metric) | 1.02 kg | 1.27 kg | 1.21 kg | 1.52 kg | 1.40 kg | 1.74 kg |
Length (Standard) | 73 in | 73 in | 80 in | 80 in | 85 in | 85 in |
Length (Metric) | 188 cm | 188 cm | 203 cm | 203 cm | 216 cm | 216 cm |
Fits (Standard) | 66 in | 66 in | 72 in | 72 in | 78 in | 78 in |
Fits (Metric) | 168 cm | 168 cm | 183 cm | 183 cm | 198 cm | 198 cm |
Girth, Shoulder (Standard) | 63 in | 75 in | 64 in | 76 in | 65 in | 77 in |
Girth, Shoulder (Metric) | 160 cm | 191 cm | 163 cm | 193 cm | 165 cm | 196 cm |
Girth, Hip (Standard) | 59 in | 73 in | 60 in | 74 in | 61 in | 75 in |
Girth, Hip (Metric) | 150 cm | 185 cm | 152 cm | 188 cm | 155 cm | 191 cm |
Girth, Foot box (Standard) | 61 in | 61 in | 61 in | 61 in | 61 in | 61 in |
Girth, Foot box (Metric) | 155 cm | 155 cm | 155 cm | 155 cm | 155 cm | 155 cm |
Packed dimension (Standard) | 9.5in x 6.5in | 10in x 6.5in | 12.5in x 7.5in | 13.5in x 7.5in | 13in x 7.5in | 14.5in x 7.5in |
Packed dimension (Metric) | 24cm x 17cm | 25cm x 17cm | 32cm x 19cm | 34cm x 19cm | 33cm x 19cm | 37cm x 19cm |
EN Comfort (C) | 0 C | 0 C | 0 C | 0 C | 0 C | 0 C |
EN Comfort (F) | 32 F | 32 F | 32 F | 32 F | 32 F | 32 F |
EN Limit (C) | -6 C | -6 C | -6 C | -6 C | -6 C | -6 C |
EN Limit (F) | 20 F | 20 F | 20 F | 20 F | 20 F | 20 F |
EN Extreme (F) | -9 F | -9 F | -9 F | -9 F | -9 F | -9 F |
EN Extreme (C) | -23 C | -23 C | -23 C | -23 C | -23 C | -23 C |
Fill material | 650 Fill Duck PFAS Free Hydrophobic Down, RDS | 650 Fill Duck PFAS Free Hydrophobic Down, RDS | 650 Fill Duck PFAS Free Hydrophobic Down, RDS | 650 Fill Duck PFAS Free Hydrophobic Down, RDS | 650 Fill Duck PFAS Free Hydrophobic Down, RDS | 650 Fill Duck PFAS Free Hydrophobic Down, RDS |
Fill weight (Standard) | 1 lb 4 oz | 1 lb 11 oz | 1 lb 7 oz | 2 lb | 1 lb 10 oz | 2 lb 4 oz |
Fill weight (Metric) | 0.57 kg | 0.77 kg | 0.65 kg | 0.91 kg | 0.73 kg | 1.03 kg |
Shell fabric | 20D 100% Recycled Nylon Rip Stop | 20D 100% Recycled Nylon Rip Stop | 20D 100% Recycled Nylon Rip Stop | 20D 100% Recycled Nylon Rip Stop | 20D 100% Recycled Nylon Rip Stop | 20D 100% Recycled Nylon Rip Stop |
Lining fabric | 20D 100% Recycled Nylon Rip Stop | 20D 100% Recycled Nylon Rip Stop | 20D 100% Recycled Nylon Rip Stop | 20D 100% Recycled Nylon Rip Stop | 20D 100% Recycled Nylon Rip Stop | 20D 100% Recycled Nylon Rip Stop |
Zipper side | Left | Left | Left | Left | Left | Left |
Therm-a-Rest actively supports industry-wide efforts to ensure all down-filled products are made with the least harm possible. We are opposed to inhumane practices and actively work with peers across all industries to improve the treatment of geese. Our product development team plays an active role in the Outdoor Industry Association (OIA) and its Textile Exchange Materials Traceability Working Group (TEMTWG). Our team also serves on the TEMTWG Down Task Force, working to address key issues in the down and feather industry and manufacturing supply chain.
To learn more about OIA Working Groups visit: www.outdoorindustry.org/resources.working
Follow the care instructions below to help maintain the high quality and extend the life of your down or synthetic Therm-a-Rest® sleeping bag.
Hydrophobic Down Care Instructions:
All hydrophobic down treatments wash out over time, and washing is hard on all down. Extend the life of your bag by spot cleaning with a damp sponge, and only machine washing when necessary.
Washing
Hand wash or machine wash in a large capacity, front loading washing machine, using 3 oz. of Nikwax® Down Wash™. Select cold water and a gentle/delicate cycle with two rinses. We recommend an additional spin cycle as well to extract as much water as possible before drying.
DO NOT dry clean. DO NOT bleach. DO NOT iron.
Drying
Hang dry your bag whenever possible. This can be a long process (24-48 hours or more), but this is by far the best way to get the longest life from your down. Use a well-ventilated, low-humidity environment. Hand-tease or shake out your bag gently to break-up down clumps, and flip it often to help speed the process.
If you need to dry your bag faster, tumble dry in a large dryer on low heat. As your bag gets drier, it will begin to loft and can actually fill the dryer chamber, preventing it from tumbling. This can cause hot spots and even melt the bag's shell, so check it often for overheating and visually inspect frequently to make sure it's tumbling. When you check it, feel for clumps of wet down and either shake the bag gently or hand-tease the clumps apart to redistribute down. Throwing in 3-5 tennis balls can help agitate the bag, breaking up those wet down clusters to speed dry times.
Nikwax® Hydrophobic Down Treatment and Re-Treatment
Use Nikwax® Down Proof™ to restore your down's hydrophobic properties. Specially formulated to renew the Nikwax Hydrophobic Down treatment, it can also be used to provide improved water-resistance to any down bag. Follow directions on the bottle.
Storage
The less time your sleeping bag is compressed, the longer it will serve you by maintaining the loft necessary to keep you warm. Store your sleeping bag loose, in a cool, dry place. If you must store it in a bag, use the extended storage sack it came in, or something even larger. Never use a waterproof bag for long-term storage.
Eraloft™ Insulation Care Instructions:
Washing
Hand wash or machine wash in large-capacity, front loading washing machine. Use a mild, non-detergent soap. Select cold water and a gentle cycle with two rinses.
DO NOT dry clean. DO NOT bleach. DO NOT iron.
Drying
Hang dry your bag whenever possible. This can be a long process (24-48 hours), but this is by far the best way to get the longest life from your bag. Use a well-ventilated, low-humidity environment. Unzip fully and flip it often to help speed the process.
If you need to dry your bag faster, tumble dry in a large dryer on low heat. As your bag gets drier, it will begin to loft and can actually fill the dryer chamber, preventing it from tumbling. This can cause hot spots and even melt the bag's shell, so check it often for overheating and visually inspect frequently to make sure it's tumbling.
Storage
The less time your sleeping bag is compressed, the longer it will serve you by maintaining the loft necessary to keep you warm. Store your sleeping bag loose, in a cool, dry place. If you must store it in a bag, use the extended storage sack it came in, or something even larger. Never use a waterproof bag for long-term storage.
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No Hassle Returns
We accept returns within 30 days of purchase. All returned items must be in new condition. Please be sure no dirt, grass or pet hair is on the item you are returning. Learn More
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. Learn More