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 we will give you a full refund- no questions asked.

Therm-a-Rest® sleeping bags are designed to accommodate a wide range of sleep positions. Therm-a-Rest sleeping bags are designed with extra room in the torso to allow your shoulders, elbows and hips to move freely. At the head and foot the fit is closer, keeping you warm and decreasing overall weight. In addition, the placement of our SynergyLink connectors is optimized to keep the mattress secure while you roll, yet allow the head and foot of the bag to rotate 90-degrees in either direction, following you for maximum comfort and warmth.

Therm-a-Rest® sleeping bags use a unique synthetic insulation that incorporates the best characteristics of both short and long staple insulation. Our EraLoft™ synthetic insulation uses three distinct fibers to create a structure that is lightweight, compressible, warm and durable. The hollow fibers are highly resistant to water and provide warmth even when wet. The insulation is built into Therm-a-Rest® sleeping bags using shingle construction, a configuration that minimizes heat loss and provides the most efficient performance.

The new ISO standard has made a few updates to the previous EN rating system. All Therm-a-Rest sleeping bags have been adhering to the most updated standards and tested in our on-site cold chamber. For more info on the EN/ISO testing, head over to our blog.

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

Sleeping bags should be stored dry and loose (not compressed) in order to extend the life of the bag. All Therm-a-Rest® sleeping bags come with a storage sack well suited for long term storage. For short-term storage or when shipping, use the compression sack to save space.

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.

Therm-a-Rest® offers a Limited Lifetime Warranty for most products including all sleeping bags. Your sleeping bag is guaranteed without time limit against defects in materials and workmanship. We also offer repair services for damages not covered under warranty. Learn more about Therm-a-Rest® Warranty & Repair.

For environmental and manufacturing reasons, we decided to remove the ThermaCapture linings from our sleeping bags. After reviewing the cost-benefit of putting the material in our bags, we could no longer justify the environmental and logistics cost. The sleeping bag specifications will see minimal changes if any and the bags will remain under the Better Sleep Guarantee.

Using a quilt can save you weight, allow for multiple sleep positions and versatility to your sleep system. To learn more by checking out our blogs on Backpacking With A Quilt and Understanding The Underestimated Camp Quilt.

WarmZip converts the sleeping bag into a more thermally efficient mummy shape, decreasing dead air inside the bag and holding the bag’s insulation closer to your body. A key WarmZip effect is pulling the insulation of a wider semi-rectangular bag into a narrower space, resulting in a thicker, and therefore warmer, layer of insulation on top of the body. For an in-depth look at the WarmZip effect, check out this blog article: https://www.thermarest.com/blog/warmzip-sleeping-bag-temperature-ratings

No. The Boost 650 has one EN/ISO temperature rating, and it rates the Boost in its default, semi-rectangular shape. We exhaustively tested WarmZip and can confidently say that it adds warmth, but the data collected from those tests cannot be used to determine an EN/ISO temperature rating. For a more detailed explanation, check out this blog article: https://www.thermarest.com/blog/warmzip-sleeping-bag-temperature-ratings .

When WarmZip is open (zipped down), the bag is a spacious, semi-rectangular shape. When it’s closed (zipped up), the bag converts to a mummy shape. Closing WarmZip adds up to 10°F/6°C of warmth to the sleeping bag.

WarmZip is a sleeping bag design innovation found on the Boost 650 that empowers you to customize the shape and warmth of your bag. It’s a zipper that runs on the top of the sleeping bag, up the center from footbox to chest.