Mountain Hardwear Phantom GORE-TEX 0 Sleeping Bag

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Designed for low-temperature pursuits such as snow camping and mountaineering, the Mountain Hardwear Phantom GORE-TEX 0 sleeping bag provides an ultrawarm reprieve from frigid mountain conditions.

  • Features

    • 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


    Many sleeping bags are rated for temperature by an independent testing protocol. REI and the broader industry now use the International Organization for Standardization (ISO) 23537 protocol, which improves on the older European Norm (EN) 13537 standard; you may still see older items in our assortment that were only EN tested. With either protocol, each bag gets a Comfort (or T-Comfort) rating and Lower Limit (or T-Limit) rating. The Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Ratings are based on a person wearing one long underwear layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38. Many brands use the Comfort rating for women's bags and the Lower Limit rating for men's and unisex bags. Everyone's body and sleep comfort differ, and conditions of use (posture, clothing, sleeping pad R-value, wind, humidity, etc.) affect total insulation, so EN and ISO ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth.
    View all Mountain Hardwear Men's Sleeping Bags
  • Technical Specs

    Best Use


    Tested Lower Limit

    0 degrees (F) - ISO

    Tested Comfort

    13 degrees (F) - ISO

    Temperature Rating (F)

    0 degrees (F)

    Temperature Rating (C)

    -18 degrees (C)


    30-denier ripstop nylon

    Zipper Location


    Insulation Type



    Goose down


    20-denier nylon taffeta

    Sleeping Bag Shape


    Shoulder Girth (in.)

    64 inches

    Hip Girth (in.)

    58 inches

    Stuff Sack Size

    17 x 9.5 inches




    Contains materials that meet the bluesign® criteria

    Down certified to the Responsible Down Standard (RDS)

  • Reviews
    16 reviews with an average rating of 4.7 out of 5 stars

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