The best sleeping bag for you depends on what you value most — minimizing weight, maximizing interior space, or prioritizing warmth. Our ExtremeLite series is built around our lightest shell fabric for weight-conscious trips, while the Microfiber series focuses on versatility, durability, and a slightly more robust feel. From there, select the temperature rating and size that best match your typical conditions and body type; many of our bags are available in 5’6″, 6’0″, 6’6″, and 7’0″ lengths to help ensure a comfortable, efficient fit.

Our sleeping bag length is designed to fit users who measure at or slightly under the listed size, so a person who is 6’0″ will fit comfortably in a 6’0″ bag. If you’re right between sizes or prefer a bit more room, many people choose to size up for a few extra inches of space, which can make it easier to move around and helps avoid compressing the down at the foot of the bag.

Choosing the right temperature rating depends on the lowest temperatures you realistically expect to encounter, as well as your personal sleep style. Some people naturally sleep warm, while others tend to sleep cold. As a general rule, we recommend selecting a bag rated for the coldest conditions you anticipate, rather than the average temperature. It’s easier to vent a slightly warmer bag than to make a lighter bag warmer once temperatures drop. Western Mountaineering temperature ratings are intended to reflect realistic comfort in the field for an average sleeper, rather than survival-based “limit” ratings. We have historically taken a conservative approach to our ratings, prioritizing dependable warmth over marketing-driven numbers. Keep in mind that your sleeping pad plays a critical role in overall warmth. An insulated pad with an appropriate R-value is essential for cold conditions, as a sleeping bag cannot compensate for heat loss to the ground. For a more detailed explanation of how we determine our ratings and how to choose appropriately, please visit our Temperature Ratings page.

Mummy bags are designed with a tapered shape that is narrower at the feet and closer fitting overall. This reduces empty space inside the bag, improves thermal efficiency, and minimizes weight and packed size. Mummy designs are ideal for backpacking, alpine climbing, and trips where warmth-to-weight ratio is a priority.Semi-rectangular bags offer a roomier cut through the shoulders and footbox, allowing for more freedom of movement and a less restrictive feel. While slightly heavier and less thermally efficient than a true mummy shape, many sleepers prefer the added comfort for side sleeping or extended trips.The right choice comes down to your priorities — maximum efficiency and weight savings, or additional space and comfort.

Our sleeping bag shell fabrics are designed around different priorities: ExtremeLite is our lightest and most compressible option, favored by backpackers and bikepackers who prioritize minimal weight and packed size; Microfiber offers a balanced middle ground, with improved water resistance and breathability over ExtremeLite while remaining relatively lightweight and durable; and GWS (Gore Windstopper) is the most weather-resistant and robust of the three, built for winter expeditions, alpine environments, and extremely wet conditions, especially for users sleeping without a tent or in a bivy.

Both Gore Windstopper (GWS) and StormShield are two-layer laminated shell fabrics that use a membrane designed to allow water vapor to escape while preventing external moisture from entering, resulting in excellent wind and water resistance. We are currently transitioning from GWS and selling through existing inventory as we move toward StormShield (STS), which offers comparable technical performance in a lighter-weight package and uses a PFAS/PFC-free, environmentally friendly DWR treatment. In terms of use, both fabrics are well suited for winter, alpine, and high-exposure conditions, with StormShield offering improved packability and reduced weight while maintaining the durability and weather protection required for demanding environments.

While Western Mountaineering now offers a direct-to-consumer option through our website, we continue to encourage customers to purchase through our authorized dealer partners whenever possible as a way to support local specialty gear shops and outdoor communities. If a local dealer doesn’t have the specific model, size, or configuration you’re looking for, most shops are happy to place a special order on your behalf and we’ll ship it to them as usual. You can find an authorized dealer near you using our dealer locator, or reach out to [email protected] if you’d like help placing an order.

All of our sleeping bags are filled and finished to order by hand in our San Jose, California facility. This ensures the highest quality and loft performance, but it does require some production time. Lead time varies depending on the item and current inventory. On average, most bags ship within 3–5 business days from the time your order is placed (not including transit time). Certain models, sizes, or specialty items may take 10–14 business days. Because each bag is individually built, our production process cannot be rushed. Orders are fulfilled in the order they are received, and we’re unable to expedite manufacturing to meet specific deadlines.

Once your order has completed production and is ready to ship, we primarily ship via UPS Ground, which typically delivers within 2–5 business days depending on your location within the United States. In certain cases, we may ship via USPS when appropriate. Please note that transit time is separate from production lead time. At this time, we do not offer expedited shipping options directly through our website. Because our sleeping bags are filled and finished to order, we strongly encourage customers to plan ahead and allow time for both production and shipping. If you’re working with a specific deadline, feel free to contact [email protected] to inquire about current lead times and availability before placing your order.

Yes — as long as your order has not yet shipped, we’re happy to help with modifications or cancellations. Please contact [email protected] as soon as possible and include your order number so we can locate your order quickly. Because our sleeping bags move into production shortly after an order is placed, we recommend reaching out promptly if changes are needed. Once an order has shipped, we’re unable to make modifications, but our team can assist with return options if necessary.

At this time, we do not offer expedited shipping options through our website. Each Western Mountaineering sleeping bag is filled and finished to order by hand, and our production process cannot be rushed. Orders are fulfilled in the order they are received to ensure consistent quality and craftsmanship. We strongly encourage customers to plan ahead and allow time for both production and shipping. If you’re working with a specific deadline, feel free to contact [email protected]. We may be able to help you locate an authorized retailer who has your desired model and size in stock for immediate purchase.

Please refer to this page for detailed care instructions.

Yes! While many customers choose to wash their sleeping bag at home, we understand that down care can feel like a project. If you’d prefer a professional option, we recommend eClean, an environmentally friendly cleaning service that uses liquid CO₂ technology instead of traditional water-based washing. This process is gentle on high-loft down insulation and technical shell fabrics, while avoiding the detergents and wastewater associated with conventional cleaning methods. It’s a great option for restoring loft and freshness without the hassle of home washing. As always, proper drying and storage are essential to maintaining performance and longevity. https://eclean.green/

Using a sleeping bag liner is one of the best ways to keep your bag clean and extend the time between washes, especially on extended trips or thru-hikes. Body oils and perspiration are the primary contributors to down deterioration and clumping, and a liner helps keep those contaminants off the insulation. We offer lightweight silk and polyester liners specifically designed to fit inside our sleeping bags, making them an easy and effective way to protect your investment.

How often a sleeping bag needs to be washed varies widely by user, conditions, and length of trips, but a good rule of thumb is to launder your bag after a season of regular use. Over time, dirt, body oils, and moisture become trapped in the down, causing the loft to diminish, which reduces insulation and can lead to cold spots and decreased performance. When your bag no longer lofts as fully as it once did or starts to feel less warm, it’s usually a sign that it’s ready to be washed.

If you have a particularly tough stain, try to use a down-friendly soap like Nikwax’s Down Wash Direct or Gear Aid’s ReviveX to spot scrub the area with a cloth. If the stain is odorous you may need to wash your product, as the odor might have penetrated the down. Refer to the above responses for how to best wash your sleeping bag.

When not in use, store your sleeping bag loosely so the down can remain fully lofted — every Western Mountaineering bag includes a large storage sack designed for this purpose, and hanging the bag is also fine as long as it stays uncompressed. Always keep your bag in a cool, dry place out of direct sunlight, and make sure it is completely dry before storage — never store a bag wet. After a trip, running the bag through a front-loading dryer on low heat can help fully dry the insulation and restore loft before putting it away.

A sleeping bag should not be stored compressed for long periods, but short-term compression will not permanently damage the down as long as the bag is completely dry. Down is naturally resilient and will regain its loft once released from compression, especially with a good shake or some time to re-expand. If a bag struggles to loft fully, running it in a dryer on no heat or low heat with clean tennis balls can help restore loft; persistent clumping is usually a sign that moisture or dirt has built up and the bag is ready to be washed.

All of our shell fabrics are treated with a fluorocarbon-free Durable Water Repellent (DWR) finish that causes water to bead on the surface, but this treatment will naturally wear over time with use. When the DWR begins to fade, it can be refreshed using a spray-on DWR treatment, which is widely available at outdoor retailers. We do not recommend wash-in DWR products, as they can interfere with the natural oils in the down; always use a spray-on treatment instead. How long a DWR lasts depends on conditions and frequency of use.

We create our gear to last a lifetime, and we think you should love your gear! If for some reason you’re not happy with your purchase, you may return new, unused gear purchased through our website for a full refund or exchange.

Returns/exchanges directly back to Western Mountaineering are only eligible for products purchase on this website. If you purchased your item through one of our dealers, please contact that store for their return/exchange policy. If you purchased from our website and would like to return/exchange, please email [email protected] with your name, original order #, and reason for returning/exchanging. Any customized items including overfills are not eligible for returns or exchanges. Please make sure the item(s) are in new condition and unused, with all original components (stuff sack, storage bag, etc.)

Western Mountaineering offers a manufacturer lifetime warranty. This means that any defect caused by manufacturer error is completely covered. This does not cover wear and tear or misuse. For example a rip from use in the field is not covered, but a broken stitch is covered. Click here for more detail on our warranty.

Most repairs can be completed at our factory in San Jose, including common issues like fabric tears, zipper problems, and down overfills. To get started, please download and complete our repair form and follow the included instructions for sending your gear in. Repair costs vary depending on the type and severity of the damage, and because repairs are labor-intensive, final pricing is often determined after we’ve inspected the item in person; however, you’re welcome to contact [email protected] with a description and photos of the issue and we’ll do our best to provide an estimate in advance.

Many zipper issues are caused by misalignment rather than a true failure, so always start by fully seating and aligning the bottom of the zipper before pulling it closed, making sure the zipper tapes are even. If the zipper teeth or coils won’t stay engaged as you pull the slider up, the slider itself may be worn — a common issue that often feels worse than it is. In many cases, a replacement slider can be installed at home; if you think this might be the issue, feel free to email us and we’d be happy to send a replacement slider along with instructions.

Yes! For smaller tears/holes in a down product, we recommend purchasing repair tape such as Gear Aid’s Tenacious Tape or Tear-Aid. These products are made to affix to your gear nearly permanently, lasting through multiple washes and years of use. Check with your repair tape’s manufacturer for how to best apply repair tape to your gear.

We are proud to have a repair team at our factory that is able to service customers in the United States & most Canadian (check with us) customers. If you have an international repair, contact us at [email protected] and we can check your local area for an authorized repair service.

An overfill adds additional down throughout a sleeping bag, increasing overall warmth by roughly 5°F while also helping the bag maintain loft over time. As a bag sees extended use, moisture, dirt, and body oils can cause down to clump and lose efficiency; adding extra fill helps offset this and can extend the usable life of the bag. Overfill is only available on continuous-baffle sleeping bags and is not applicable to garments or sewn-through items. For eligible models, see our overfill item page for current costs and a recommended fill chart.

We don’t offer fully custom builds or one-off color variations — our fabric is cut in large production batches, which makes individual customizations impractical. That said, there are a few ways to fine-tune fit and performance: we can add overfill to eligible sleeping bags for extra warmth and loft, and we offer expanders to increase interior width on compatible models. And as we like to remind folks, it’s usually dark when you’re using your sleeping bag anyway — so the color rarely matters once you’re zipped in.

Through our own testing, we’ve found that the performance benefits of hydrophobic treatments on high-quality down are often overstated. Premium, untreated goose down naturally contains water-repellent oils — which makes sense, given that geese spend much of their lives in wet environments — and these oils help maintain loft and insulation over time. Hydrophobic treatments tend to wash out much like a DWR and can strip away those natural oils during application, potentially reducing long-term performance. Combined with the strong water resistance of our shell fabrics, we don’t feel hydrophobic down provides a meaningful advantage and, over the lifetime of the product, may actually work against it.

Yes — ethical sourcing has been a cornerstone of Western Mountaineering for decades. We work closely with and regularly audit our primary down supplier, including unscheduled inspections, to ensure high animal-welfare standards are consistently met. The geese are raised humanely, allowed to roam freely, and live to maturity, where they naturally molt down while nesting; this down is collected while the birds are out feeding, without harm or live plucking. Because our down comes from large, mature geese, it delivers exceptional fill power while also meeting the highest ethical standards.

We work closely with our suppliers to source the highest-quality down available, and our down often tests at 900 fill power or higher under laboratory conditions. We conservatively rate our products at 850+ fill power to better reflect real-world performance, as loft can vary due to fabric compression inside baffles, ambient humidity, and natural batch-to-batch or seasonal variation in down. This ensures our published specifications remain accurate, consistent, and reliable in actual field use.

All 6’0″ and 6’6″ Western Mountaineering sleeping bags can be zipped together as long as one has a right zipper and the other a left zipper. 5’6″ bags can also be paired with 6’0″ or 6’6″ bags, though the zippers will not align perfectly at the top. To couple two bags, fully unzip both, align each zipper half with the opposite bag, and zip them together. Semi-rectangular models are also compatible for coupling, making it easy to create a shared sleep system when needed.

We intentionally size our included stuff sacks slightly larger than necessary to make packing quicker and easier in the field. If you’re looking to reduce packed size, a strap-assisted compression sack can typically achieve a 25% or greater reduction, and we recommend choosing one that’s a bit larger than the bag’s minimum compressed volume so the initial stuffing is easy — then let the straps do the hard work. There’s no downside to temporarily compressing your bag during use or travel, but never compress or store it while wet.

Pro tip: for bags with StormShield or GWS shells, flipping the bag inside out before stuffing can make the process noticeably easier.

Sleeping bags with continuous baffles have connected chambers on the top and bottom of the bag, allowing down to be shifted where it’s needed most. This design, found on many ExtremeLite models and most sleeping bags rated 0°F and above, lets you move insulation underneath you on warmer nights for less warmth, or redistribute more down to the top of the bag in colder conditions for increased insulation and comfort.

We determine our temperature ratings through a combination of in-house testing, long-term design experience, and extensive customer feedback, and many of our models have been in continuous production for years, giving us a strong real-world performance baseline. While we have EN-tested a number of our sleeping bags, the temperature ratings published on our website and specification charts are Western Mountaineering ratings, not direct EN comfort or lower-limit values; in most cases, our stated ratings fall between those two EN benchmarks. We aim to publish conservative, real-world temperature ratings that represent the lower end of a bag’s intended warmth range when used correctly — including proper positioning, good care, and use of an appropriate insulated sleeping pad. All available EN test results can be found on our Temperature Ratings page, which provides additional context on how to interpret both rating systems.