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Winter

Best Winter Sleeping bags. Award winning and top reviewed  down and synthetic cold weather sleeping bags from Thermarest, Rab, Marmot, Nemo, Sea to Summit

Therm-a-Rest Questar 0 Down Sleeping Bag (-18C)
$459.95 - $559.95
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. Thermarest has loaded this bag with the comfort features that Therm-a-Rest bags are known for. The Thermarest 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. Weight: 1.21kg / 2.67lbs Fill: 650 fill power Nikwax Hydrophobic RDS Down Fill Weight: 820g / 1.81lbs Bag Shape: W.A.R.M. fit
Therm-a-Rest Saros 0 Sleeping Bag (-18C)
$319.95
To keep freezing conditions at bay, the Saros uses synthetic eraLoft™ insulation for cozy warmth. When the weather gets frigid and the forecast looks damp, the Saros 0F/-18C is equipped to keep you resting better. The Saros uses Thermarest's eraLoft™ synthetic insulation, which is quick-drying and weather resistant, making it ideal for backpacking and mountaineering in wet weather from spring to fall. The fit of the bag has been perfected in Thermarest's onsite cold chamber to create their W.A.R.M. fit that allows room for multiple sleep positions without compromising thermal efficiency. Our SynergyLink™ Connectors also integrate the Saros with your pad to ensure superior comfort with efficient warmth and the freedom to move as you like for the best night's rest possible. The Saros is offered in three sizes and designed to fit both men and women. Compression sack and storage sack included. Weight: 2.24kg / 4.94 lbs Fill: eraLoft™ water-resistant hollow fiber synthetic fill
Rab Andes 800 Down Sleeping Bag ( -22C)
$674.96 $899.95 25% Off
Combining 800FP goose down with heat reflective TILT technology and a GORE-TEX INFINIUM™ WINDSTOPPER® outer, the Andes Infinium offers an exceptional warmth to weight ratio ideal for expeditions in freezing conditions. Offering refuge to those exploring the world’s highest peaks and the polar regions, the Andes Infinium is packed with cutting edge tech, built to keep you warm. The Andes Infinium 800 is filled with 800g of ultra-high lofting 800FP, goose down. It is constructed using trapezoid shaped boxwall baffles, which stack together reducing cold spots and maximise the lofting and efficiency of the down inside. Reflecting heat towards the body, our TILT technology is seen as a silver sheen on this inside of the bag. Reducing heat loss by up to 32%, TILT substantially improves thermal insulation without compromising pack size, breathability, or weight. It has a mummy fit and offers a similar level of warmth to our Expedition range of sleeping bags, but in a lower bulk package. The GORE-TEX INFINIUM™ WINDSTOPPER® outer provides a robust, windproof shield against icy chills, and the face baffle and 3D neck collar cinch in snug around the face to seal in the heat. The ¾ length YKK® zip has its own internal baffle to avoid heat escaping and an angled foot box allows for a comfortable sleeping position. Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth. Bag Weight: 1.375 kg / 3.03 lbs Fill: 800FP European Goose Down with Nikwax Fluorocarbon-Free Hydrophobic Finish Fill Weight: 800 g / 1.76 lb Bag Shape: Wide Mummy
Rab Andes Infinium 800 Down Sleeping Bag (-23C) - Womens
$674.96 $899.95 25% Off
Combining 800FP goose down with heat reflective TILT technology and a GORE-TEX INFINIUM™ WINDSTOPPER® outer, the Andes Infinium offers an exceptional warmth to weight ratio ideal for expeditions in freezing conditions. This women's bag has a shorter length and female specific shape to improve efficiency. Offering refuge to those exploring the world’s highest peaks and the polar regions, the Andes Infinium is packed with cutting edge tech, built to keep you warm. The Andes Infinium 800 is filled with 800g of ultra-high lofting 800FP, goose down. It is constructed using trapezoid shaped boxwall baffles, which stack together reducing cold spots and maximise the lofting and efficiency of the down inside. Reflecting heat towards the body, our TILT technology is seen as a silver sheen on this inside of the bag. Reducing heat loss by up to 32%, TILT substantially improves thermal insulation without compromising pack size, breathability, or weight. It has a mummy fit and offers a similar level of warmth to our Expedition range of sleeping bags, but in a lower bulk package. The women’s specific cut is fractionally shorter than the regular bag with a narrower shoulder and marginally wider hip space, for comfort and efficiency. The GORE-TEX INFINIUM™ WINDSTOPPER® outer provides a robust, windproof shield against icy chills, and the face baffle and 3D neck collar cinch in snug around the face to seal in the heat. The ¾ length YKK® zip has its own internal baffle to avoid heat escaping and an angled foot box allows for a comfortable sleeping position. Hand-filled in the UK, all Rab down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth. Bag Weight: 1.36 kg / 3.0 lbs Fill: 800FP European Goose Down with Nikwax Fluorocarbon-Free Hydrophobic Finish Fill Weight: 800 g / 1.76 lbs Bag Shape: Wide Mummy
Rab Ascent 1100 Down Sleeping Bag - Women's (-25C)
$389.96 $519.95 25% Off
The warmest in the Ascent range, the Ascent 1100 is a 650FP duck down-filled, adventure-ready sleeping bag with a recycled Pertex® Quantum outer. Designed with a comfortable wide shape and women’s specific fit, it's ideal for those buying their first down sleeping bag for extremely cold conditions. The Ascent 1100 is an extremely warm bag with a comfortable, wide mummy fit. Filled with 1100g of 650FP goose down and with space for wearing additional layers if needed, this bag can be used in seriously cold temperatures. Ideal for winter use or even as high altitude, base camp refuge. The Ascent is built with a lightweight and durable, recycled Pertex® Quantum outer fabric and recycled nylon lining. It has trapezoid shaped, boxwall baffles that stack neatly together, encouraging the hydrophobic duck down inside to loft fully and reducing the appearance of cold spots. Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth. The women’s specific shape is slightly shorter in length, narrower at the shoulders, and wider at the hips than the regular fit bag for improved efficiency. The generous mummy fit with wide foot box provide a spacious feel for an easy night’s sleep, and the close-fitting neck baffle keeps the heat in when the temperature drops. It has a ¾ length main zip with a down filled baffle to keep out the draught. Practicalities are taken care of with an internal zipped stash pocket that easily fits a phone or a headlamp, a cotton storage sack and a compression stuff sack to ensure a manageable pack size and protection on the road. Exploring with a partner or want extra space? Pick up a left and a right zipped bag and you can zip them together. Bag Weight: 1.67 kg / 3.68 lbs Fill: 650FP European Duck Down with Nikwax Fluorocarbon-Free Hydrophobic Finish Fill Weight: 1.10 kg / 2.43 lbs Bag Shape: Wide Mummy
Rab Ascent 900 Down Sleeping Bag (-18C)
$359.96 $479.95 25% Off
A very warm, 650FP duck down sleeping bag with a recycled, wind-resistant Pertex® Quantum outer. Designed with a comfortable wide shape, it's ideal for those buying their first down sleeping bag for use in cold, winter conditions. The Ascent 900 is a very warm bag with a comfortable, wide mummy fit. Filled with 900g of 650FP goose down and with space for wearing additional layers if needed, this bag can be used in cold temperatures. Ideal for four season use, in winter conditions similar to those in the UK, New Zealand or Scandinavia. The Ascent is built with a lightweight and durable, recycled Pertex® Quantum outer fabric and recycled nylon lining. It has trapezoid shaped, boxwall baffles that stack neatly together, encouraging the hydrophobic duck down inside to loft fully and reducing the appearance of cold spots. Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth. The generous mummy fit with wide foot box provide a spacious feel for an easy night’s sleep, and the close-fitting neck baffle keeps the heat in when the temperature drops. It has a ¾ length main zip with a down filled baffle to keep out the draught. Practicalities are taken care of with an internal zipped stash pocket that easily fits a phone or headlamp, a cotton storage sack and a compression stuff sack to ensure a manageable pack size and protection on the road. Exploring with a partner or want extra space? Pick up a left and a right zipped bag and you can zip them together.
Rab Ascent 900 Down Sleeping Bag - Womens (-18C)
$359.96 $479.95 25% Off
A very warm, 650FP duck down sleeping bag with a recycled, wind resistant Pertex® Quantum outer. Designed with a comfortable wide shape and women’s specific fit, it's ideal for those buying their first down sleeping bag for use in cold, winter conditions. The Ascent 900 is a very warm bag with a comfortable, wide mummy fit. Filled with 900g of 650FP goose down and with space for wearing additional layers if needed, this bag can be used in cold temperatures. Ideal for four season use, in winter conditions similar to those in the UK, New Zealand or Scandinavia. The women’s specific shape is slightly shorter in length, narrower at the shoulders, and wider at the hips than the regular fit bag for improved efficiency. The Ascent is built with a lightweight and durable, recycled Pertex® Quantum outer fabric and recycled nylon lining. It has trapezoid shaped, boxwall baffles that stack neatly together, encouraging the hydrophobic duck down inside to loft fully and reducing the appearance of cold spots. Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth. The generous mummy fit with wide foot box provide a spacious feel for an easy night’s sleep, and the close-fitting neck baffle keeps the heat in when the temperature drops. It has a ¾ length main zip with a down filled baffle to keep out the draught. Practicalities are taken care of with an internal zipped stash pocket that easily fits a phone or a headlamp, a cotton storage sack and a compression stuff sack to ensure a manageable pack size and protection on the road. Exploring with a partner or want extra space? Pick up a left and a right zipped bag and you can zip them together. Bag Weight: 1.475 kg/ 3.25 lbs Fill: 650FP European Duck Down with Nikwax Fluorocarbon-Free Hydrophobic Finish Fill Weight: 900g / 1.98 lbs Bag Shape: Wide Mummy
Rab Neutrino 800 Down Sleeping Bag (-22C)
$502.46 $669.95 25% Off
Eliminating excess bulk with a highly tapered design and offering exceptional warmth for its weight, this bag is built for fast and light, winter mountain missions. Filled with 800FP goose down and covered with a recycled, wind resistant Pertex® Quantum outer. For the alpinist looking for a lightweight, low bulk bag suitable for sub zero temperatures, the Neutrino 800 offers exceptional packability and warmth for its weight. Designed with a narrow mummy fit, for reduced bulk and pack size, and constructed with lightweight, high performance materials. It’s perfect for four season mountain missions. The Neutrino 800 is filled with 800g of 800FP, goose down, stabilised in chevron shaped baffles, cleverly designed to reduce the amount of fabric needed compared to traditional horizontal baffles. The trapezoid boxwall baffle construction allows the down to fully loft, eliminates cold spots, and maximises warmth. Additional baffles along the length of the zip and around the neck decrease heat loss, and with an adjustable drawcord around the hood you can cinch the bag around your face. Now built with a recycled nylon lining and recycled Pertex® Quantum outer, it’s wind resistant and a little lighter on the planet too. The down is also finished with a Nikwax, fluorocarbon-free hydrophobic treatment for coping with condensation. It has a ¾ length zip with anti-snag zip guards, a zipped internal stash pocket and comes with a waterproof roll-top compression sack for easy stashing. Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth. Bag Weight: 1.208 kg / 2.66 lbs Fill: 800FP European Goose Down with Nikwax Fluorocarbon-Free Hydrophobic Finish Fill Weight: 800 g / 1.76 lbs Bag Shape: Tapered Mummy
NEMO Sonic Down Sleeping Bag (-18C)
$729.95 - $799.95
Sonic is built to be the only bag you need from -20°F to 40°F. The Backpacker Editors’ Choice award-winning big-mountain bag offers exceptional warmth and tuneability with a reduced environmental impact. This bag features our next-generation Thermo Gill™ vents, with a new multistage zipper system that dramatically increases the usable temperature range of the bag and allows fine-tuning of comfort from within. Sonic’s chevron baffle construction better compartmentalizes down, eliminating migration and keeping the down evenly lofted. (Not to mention, it looks awesome.) The shell and liner fabrics are 100% recycled fabrics and bluesign® approved, and the premium 800 FP hydrophobic down is 100% Responsible Down Standard (RDS) certified. Years of history in the field yielded detailed upgrades on this bag, including a perfected profile, redesigned draft collar, and bolstered draft tubes. The proven Nemo Toester™ footbox keeps feet warmer, provides a waterproof barrier against tent wall condensation, and protects down from moisture while drying damp clothes inside the footbox. Adaptable to whatever the mountain throws at it, Sonic continues to reverberate as the ultimate extreme weather companion. Bag Type: Mummy Bag Weight: 1.47kg / 3.25lbs Fill: 800 FP PFC-Free, RDS certified hydrophobic down? Fill Weight: 790g / 1.75lbs Compressed Volume: 9.6L
Mountain Hardwear Bishops Pass Down Sleeping Bag (-18C) - Women's
$279.97 $399.95 30% Off
For campers and climbers who are always on the move and always shifting focus, count on the all-around down bag that can keep up. Made with a footbox that follows a more natural position, high-performance insulation, and contact-capable materials, it packs versatility and performance into one. So, however your season takes shape?backpacking in the Sierras, car camping in Yosemite, or bunkering down in the Buttermilks?the Bishop Pass™ will match. Bag Type: Mummy Bag Weight: 1.44 kg / 3.18 lbs Fill: 650-fill Down RDS Cert/Fluorine Free Fill Weight: 990g / 2.19 lbs
Mountain Hardwear Bozeman Sleeping Bag (-18C)
$146.97 $209.95 30% Off
After a night of driving through the Rockies to get to your destination, lay the backseats down, slide into your Bozeman™ Sleeping Bag (or two), turn your stuff sack inside out and into a fleece pillow, and start dreaming of frozen falls and swinging axes. No matter your sleep style, there's a configuration to match. Even if you're going old-school, full-zip mode, you get a less-mummified mummy fit for roomy comfort that maximizes warmth. So, anyone can have a solid sleep experience and wake up refreshed and ready to rip. Bag Type: Mummy Bag Weight: 2479 kg / 5.46 lbs Fill: Thermal.Q™ Recycled|80% Recycled Polyester, 20% Polyester Compressed Volume: 19.43L
Marmot Ouray 0 Down Sleeping Bag (-18C) - Women's
$297.47 $424.95 30% Off
Curl up in comfort with the Women's Ouray 0° Sleeping Bag. With 650-fill-power down plus a cinchable draft collar to prevent heat loss, this sleeping bag is built for overnights in temps down to single digits. The women-specific cut keeps warmth where you want it, and dual-side zips make it easy to climb in and out. Looking for more room? Open the footbox for space to stretch or zip it up for extra warmth. Unzip the extended zipper flaps on extra-cold nights for blanket-like coverage. Bag Weight: 1.74 kg / 3.84 lbs Fill: Down defender, 650 Fill Power, Duck Down Fill Weight: 1.09kg / 2.41 lbs
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