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Item #: mtb0099

Mont Bell

U.L. Spiral Down Hugger #1 Sleeping Bag (800 Down)

Mont Bell
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Product Information

Product Information For The Mont Bell U.L. Spiral Down Hugger #1 Sleeping Bag (800 Down)

Specs

Brand Mont Bell
Weight 2 lbs
Awards Past Award Winners
Max User Height 6 ft 0 in (Regular), 6 ft 6 in (Long)
Shoulder Girth 56.7" - 68"
Fill Weight 1 lb 4 oz
Insulation 800 Fill Goose Down
Insulation Type 800+ Down Insulation
Material Polkatex & 12-denier Ballistic Nylon
Packed Size 6.9" x 13"
Temperature Range 15° to 20°
Temperature Rating 15°

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Description

Winner of the Outside Magazine Gear of the Year Award. Mont-Bell U.L. Sprial Fill #1 Sleeping bags are a great combination of classic mummy cut, innovative construction, high quality 880 fill down, and ultra light fabric. This bag is born to be Light & Fast. Spiral technology allows amazing interior space and more stretch than a typical bag. The Mont-Bell U.L. Spiral Fill #1 Sleeping Bag is rated to 15 degrees.

Details

  • Spiral StretchTM System (PAT.Pending)
  • Stuff sack and storage sack included
  • Elite 100-wash rated Durable Water Repellence combined with our lightest fabric
Reviews

Reviews For The Mont Bell U.L. Spiral Down Hugger #1 Sleeping Bag (800 Down)

REVIEW SNAPSHOT®

by PowerReviews
Mont BellU.L. Spiral Down Hugger #1 Sleeping Bag (800 Down)
 
4.5

(based on 11 reviews)

100%

of respondents would recommend this to a friend.

Pros

  • Lightweight (7)
  • Warm (5)
  • Comfortable (3)

Cons

    Best Uses

    • Backpacking (5)

    Reviewed by 11 customers

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    4.0

    toasty warm and comfy

    By vitamin-D

    from Crested Butte, CO

    Verified Buyer

    Pros

    • Light wieght
    • Very packable
    • Warm and cozy

    Cons

    • Right side only zip
    • Weak velcro closures

    Best Uses

    • Elk hunting
    • Ultra Light Backpacking

    Comments about Mont Bell U.L. Spiral Down Hugger #1 Sleeping Bag (800 Down):

    I have used the bag for elk scouting bivouacking on 12000+ ft ridges. Temps dropped to freezing and I was more than comfortable. It's light weight and packability are key when you have to move quickly chasing elk herds. This bag will be great for rifle season in mid October. The only downside was the velcro closures on the draft collar and hood keep opening during the night. Right side zip only is a bummer due to most tents have doors on the left side but will probably only use the bag with my bivy sack.

     
    5.0

    Super Bag

    By Georgia Clint

    from Byron, GA

    About Me Avid Adventurer

    Verified Reviewer

    Pros

    • Comfortable
    • Lightweight
    • Packs Small
    • Roomy
    • Warm

    Cons

      Best Uses

      • Backpacking

      Comments about U.L. Spiral Down Hugger #1 Sleeping Bag (800 Down):

      I've had this bag for a year. It is great and the stretch is great for anyone that likes to move around. After using it I don't see how I could go back to a regular non-stretch bag. It is warm and comfortable to past the temp rating to me. Packs down small. I would recommend this bag to anyone.

      • What Is Your Gear Style:
      • Minimalist
      • Was this a gift?:
      • No
       
      5.0

      Perfect sleeping bag

      By Brian

      from Boise, ID

      Pros

      • Comfy
      • Great DWR
      • Light
      • Warm
      • Water beads off

      Cons

        Best Uses

        • Backpacking
        • Camping

        Comments about U.L. Spiral Down Hugger #1 Sleeping Bag (800 Down):

        I bought this bag earlier this year and really liked it but decided to sell it to get a quilt style bag for the weight savings but ended up buying another one of these same Mont-Bells because I liked it so much the first time. This bag is super warm and would consider it true to it's temp rating. The DWR on this bag rocks too! You can pour water on the bag and it just beads off. No need to be afraid of the down getting wet! I haven't had the bag long enough to know how long the DWR will last though.

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        Questions & Answers

        Q & A For The Mont Bell U.L. Spiral Down Hugger #1 Sleeping Bag (800 Down)

        Technology Used In The U.L. Spiral Down Hugger #1 Sleeping Bag (800 Down)

        Baffled Construction

        Baffles are chambers created between the outer shell and inner liner of a sleeping bag or jacket. These chambers hold the insulation and create an even distribution, preventing unwanted grouping of insulation. There are different types of baffles. A "stitched-through" baffle joins the outer shell and inner liner together by means of direct stitching. Heat loss through seams is a disadvantage of the stitched through baffle. Optimal warmth is achieved through the use of a "box wall" style baffle. This method uses additional material between the outer and inner materials to create a wall that unites the two layers and creates a slightly larger and more uniform baffle. Different variations on the box wall positioning create a variety of advanced baffle systems.

        Down Insulation

        Water foul, like geese and duck, actually provide one of the most efficient forms of insulation available. Down is the light, fluffy undercoating at the base of the feathers of waterfowl. Down is a multi-dimensional structure that insulates by creating pockets of still air that retain body heat. Down is highly breathable and exceptionally comfortable. It is longer lasting and much more compressible than synthetic insulation. A disadvantage of down insulation is its loss of efficiency in wet conditions. It will also take much longer to dry than a synthetic insulation. Down is available in different fill powers. Fill power is defined by the amount of loft that is gained under loft test conditions. The higher the fill power number the greater the loft and the greater the performance of the down insulation. Fill powers may range from 500 fill to 900+ fill power.

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