Sleeping Bags


Western Mountaineering manufactures a broad range of down sleeping bags in different shapes, sizes and shell fabric options. Whether you are car camping with the family, through hiking the PCT, or climbing Mount Everest, we make a sleeping bag that will keep you warm and comfortable on any outdoor adventure.

Every one of our sleeping bags is manufactured in the USA, with careful attention to detail and made to exceed the expectations for performance, quality, and longevity. We have grouped the sleeping bags in series according to the shell fabric options as choosing a material brings into focus the models which are most likely to have the performance characteristics you are looking for.

ExtremeLite Series

As the name suggests, these are our lightest models. We have over 12 models weighing less than 2 lbs (under 900 grams) and several models that weigh less than 1 lb (under 450 grams). These bags feature outer shell fabrics in high density nylon rip stops (7 denier to 12 denier) and the lining material is a nylon taffeta (10 denier to 15 denier) all woven with super high density and nearly square construction specifically for Western Mountaineering.

Model Shape Rating Weight
EverLite Mummy (w/ full collar) 45° F  /  7° C 14.5 oz / 410 g
Slinglite Underquilt Semi Rec 20° F  /  -7° C 13 oz / 370 g
MityLite Semi Rec 40° F  /  4° C 1 lb 10 oz / 735 g
NanoLite Baffled Top Quilt Mummy 38° F  /  3° C 11 oz / 312 g
HighLite Mummy (box stitched) 35° F  /  2° C 16 oz / 455 g
AstraLite Baffled Top Quilt Mummy 26° F  /  -3° C 16 oz / 454 g
SummerLite Mummy 32° F  /  0° C 1 lb 3 oz / 540 g
MegaLite Mummy (w/ top collar) 30° F  /  -2° C 1 lb 8 oz / 680 g
Tamarak Semi Rec 30° F  /  -2° C 19 oz / 540 g
Semilite Semi Rec 25° F  /  -4° C 13 oz / 370 g
TerraLite Semi Rec 25° F  /  -4° C 1 lb 13 oz / 820 g
UltraLite Mummy (w/ full collar) 20° F  /  -7° C 1 lb 13 oz / 820 g
Alpinlite Mummy (w/ full collar) 20° F  /  -7° C 1 lb 15 oz / 880 g
Versalite Mummy (w/ full collar) 10° F  /  -12° C 2 lb / 905 g

Note:   Weights listed are for standard length bags.

Microfiber Series

Our Microlite XP Microfiber shell fabric strikes the perfect balance of breathability, water resistance, and durability for outstanding performance throughout a broad range of temperatures and conditions. The high density of filaments in each yarn plus the balanced weave of more than 400 threads make it the most breathable of our sleeping bag shell fabrics while providing excellent water repellency that will be effective for decades. Only slightly heavier than our Extremlite Series fabrics, this 20 denier polyester rip stop microfiber is still very lightweight and will be down proof for decades.

Model Shape Rating Weight
Caribou MF Mummy (box stitched) 35° F  /  2° C 1 lb 5 oz / 595 g
Alder MF Semi Rec 25° F  /  -4° C 1 lb 15 oz / 880 g
Sycamore MF Semi Rec 25° F  /  -4° C 2 lb / 905 g
Ponderosa MF Semi Rec 15° F  /  -9° C 2 lb 11 oz / 1220 g
Apache MF Mummy (w/ full collar) 15° F  /  -9° C 2 lb / 905 g
Badger MF Mummy (w/ full collar) 15° F  /  -10° C 2 lb 6 oz / 1075 g
Antelope MF Mummy (w/ full collar) 5° F  /  -15° C 2 lb 7 oz / 1105 g
Sequoia MF Semi Rec (w/ full collar) 5° F  /  -15° C 3 lb 4 oz / 1475 g
Kodiak MF Mummy (w/ full collar) 0° F  /  -18° C 2 lb 15 oz / 1330 g
Bristlecone MF Semi Rec (w/ full collar) -10° F  /  -23° C 3 lb 15 oz / 1785 g
Lynx MF Mummy (w/ full collar) -10° F  /  -23° C 3 lb 2 oz / 1415 g
Puma MF Mummy (w/ full collar) -25° F  /  -32° C 3 lb 7 oz / 1560 g

Note:   Weights listed are for standard length bags.

Gore Windstopper Series

For the most extreme conditions, we offer a wide range of models with Gore Windstopper shell fabric. This is the most breathable of the laminated fabrics we have tested and the performance of this lightweight two layer material stands above the competition in terms of water resistance, weight, breathability and longevity. Gore has been perfecting their waterproof breathable technology for over forty years and their lightest laminated fabrics keep the insulation dry by providing a breathable barrier against wind and water. All of our Expedition Series bags feature Gore Windstopper shell fabrics to keep the insulation dry even in the most extreme cold or wet conditions.

Model Shape Rating Weight
Apache GWS Mummy (w/ full collar) 15° F  /  -9° C 2 lb 6 oz / 1075 g
Badger GWS Mummy (w/ full collar) 15° F  /  -10° C 2 lb 13 oz / 1275 g
Antelope GWS Mummy (w/ full collar) 5° F  /  -15° C 2 lb 13 oz / 1275 g
Sequoia GWS Semi Rec (w/ full collar) 5° F  /  -15° C 3 lb 10 oz / 1645 g
Kodiak GWS Mummy (w/ full collar) 0° F  /  -18° C 3 lb 5 oz / 1500 g
Lynx GWS Mummy (w/ full collar) -10° F  /  -23° C 3 lb 8 oz / 1590 g
Puma GWS Expedition Mummy (w/ full collar) -25° F  /  -32° C 3 lb 12 oz / 1700 g
Cypress GWS Expedition Semi Rec (w/ full collar) -30° F  /  -34° C 4 lbs 14 oz / 2210 g
Bison GWS Expedition Mummy (w/ full collar) -40° F  /  -40° C 4 lb 10 oz / 2095 g

Note:   Weights listed are for standard length bags.






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