Mountain Hardwear Phantom GORE-TEX -40 Sleeping Bag

$990.00to $1,020.00
Color: Alpine Red
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Order by 9am PT on Dec. 19 for delivery before Dec. 25. Members get free shipping! 
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A mission-critical piece designed for high-altitude expeditions and the most bone-chilling conditions on Earth, the Mountain Hardwear Phantom GORE-TEX -40 is the brand's most protective sleeping bag.


  • 850-fill-power down certified to the Responsible Down Standard (RDS) provides optimal warmth-to-weight ratio and compressibility
  • GORE® WINDSTOPPER® shell fabric is 100% windproof and blocks external moisture from getting into the bag, while allowing moist air inside the bag to escape
  • Oversize zipper draft tube prevents cold spots along the zipper
  • Tuck stitching protects baffle stitches from abrasion, adding to the bag's longterm durability
  • Expedition mummy cut efficiently adds extra girth to allow for layering in the coldest conditions, plus an extra 6 in. of length for gear storage in freezing temps
  • Regular size has an internal length of 87 in.; Long size has an internal length of 93 in.
  • Lightweight and durable #5 antisnag zipper offers easy entry and exit
  • 3D anatomically contoured footbox follows natural foot position for maximum warmth and comfort
  • Shaped, down-filled draft collar blocks the escape of warm air from inside the bag
  • Nylon compression sack and mesh storage sack included
  • Face gasket with cinch comfortably block drafts at hood opening
  • Vertical sidewall baffles add warmth and maximum loft
  • Glow-in-the-dark, reflective zipper pull is easy to find at night


View all Mountain Hardwear Backpacking Sleeping Bags

Technical Specs

Best Use


Temperature Rating (F)

-40 degrees (F)

Temperature Rating (C)

-40 degrees (C)


Regular - Left Zip: 4 lbs. 10 oz.

Long - Left Zip: 4 lbs. 10.9 oz.


30-denier ripstop nylon

Zipper Location


Insulation Type



Goose down

Fill Weight

Regular - Left Zip: 2 lbs. 14 oz.

Long - Left Zip: 3 lbs.


20-denier nylon taffeta

Sleeping Bag Shape


Fits Up To (in.)

Regular - Left Zip: 72 inches

Long - Left Zip: 78 inches

Shoulder Girth (in.)

66 inches

Hip Girth (in.)

62 inches

Stuff Sack Size

20 x 11 inches

Stuff Sack Volume

Regular - Left Zip: 14.6 liters

Long - Left Zip: 17.8 liters

Compressed Volume

Regular - Left Zip: 14.6 liters

Long - Left Zip: 17.8 liters




Contains materials that meet the bluesign® criteria

Down certified to the Responsible Down Standard (RDS)

27 reviews with an average rating of 4.6 out of 5 stars

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