MontBell U.L. Spiral Down Hugger #1

3 reviews
5-star:   3
4-star:   0
3-star:   0
2-star:   0
1-star:   0


regular long
Weight 2 lb 1 oz / 940 g 2 lb 4 oz / 1000 g
Fill weight 1 lb 4 oz / 570 g 1 lb 6 oz / 620 g
Temperature rating 15 F / -9.4 C 15 F / -9.4 C
Fill 800 fill-power down 800 fill-power down
Shape mummy mummy
Max user height 5 ft 10 in / 180 cm 6 ft 4 in / 190 cm
Shoulder girth 57 - 68 in / 140 - 170 cm 61 - 74 in / 150 - 190 cm
Knee girth 46 - 55 in / 120 - 140 cm 49 - 59 in / 120 - 150 cm
Price $379.00 USD $404.00 USD



Warmth-to-weight is amazing as always with Montbell.

Rating: rated 5 of 5 stars
Source: bought it new
Price Paid: 30,000 yen or so


Warmth-to-weight is amazing as always with Montbell. Stretchy design makes sleeping easy for even the tossiest and turniest of us.


  • Design
  • Warmth-to-weight
  • Packs down small

Bought mine a while back in Japan and can say after 20+ years of buying bags this is the ultimate bag in my arsenal. Light, warm, stretchy, and packs down to very little, especially if you use a compression sack.

You really can't go wrong with anything from Montbell, but their bags are unreal. Check any and all reviews and they all say the same.


Bag is very light 2 lbs, compresses to fit in Nalgene…

Rating: rated 5 of 5 stars
Source: bought it new
Price Paid: $300


Bag is very light 2 lbs, compresses to fit in Nalgene bottle and warm as can be.


  • Warm
  • Light
  • Compressible


  • None

Bought two of these, one for my son and myself. Have used many times on Appalachian Trail and Boy Scout camps in below zero temps. Can not be beat, great bags. You have to get used to the entire bag rotating when you move, you don't twist within the bag, but that's why it is warm.


This is a great sleeping bag: light weight and stuffs…

Rating: rated 5 of 5 stars
Price Paid: $299.99

This is a great sleeping bag: light weight and stuffs down small, also keeps you very warm!

No complaints.

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Manufacturer's Description

Visit MontBell's U.L. Spiral Down Hugger #1 page.

Retailers' Descriptions

Here's what other sites are saying:

The Mont Bell Down Hugger #1 Short Sleeping Bag has brought extreme comfort and thermal efficiency to the light weight backcountry enthusiast. To create an even more comfortable system, an elasticized thread in the stitch creates small "gathers" in the quilting. Through the combination of strategic seam orientation and the stretch provided by gathered quilting we offer unrivaled fit and comfort. These innovations allow the sleeping bag to move with you as you change positions throughout the night, drawing the 800 fill goose down closer to your body and eliminating drafty dead spaces.


The combination of strategic seam orientation, and the stretch provided by gathered quilting, makes the MontBell Down Hugger 800 #1 sleeping bag move with you and fit closer. The premium 800 fill goose down is utilized more effectively with the ''hugging'' effect of this innovative sleeping bag. Super Spiral Stretch System offers even more stretch than the Spiral, in addition to orienting the fabric's warp and weft threads at a 45deg angle, the Super Spiral utilizes an elastic stitch technique to create small ''gathers'' in the quilting Sprawling or claustrophobic sleepers will find refuge in the elasticity of this mummy bag Multi-tube construction with Flow Gate(TM) partitions ensure even heat distribution, limit down migration and add to the overall life of the bag Tunnel Hood is engineered to keep you warm while allowing air flow through a small face hole Draw cord for face hole adjustment Neck baffle prevents air from escaping through the top of the bag Dual insulated draft tubes prevents air from circulating through the zipper Auto Locking Zipper to limit zipper "slip" during the night 2-way full-length (67 in) zippers allow the bag to be used as a blanket or joined with another MontBell bag Includes tapered, bias stretch stuff sack and cotton storage sack

- OMCgear

By integrating a woven fabric cut on the bias and orienting the fabric s wrap and weft threads at 45 degrees to major seam lines the sleeping bag becomes more fluid or elastic in nature. Additionally, coiled or crimped fibers are used in the fabric weave to capitalize on their inherent stretch properties. The result is a flexible sleeping bag that makes tent life more bearable. The U.L Spiral Down Hugger #1 can stretch enough to accommodate all the gear you need to keep warm, getting dressed in the bag on cold mornings, and depending on how flexible you are, sitting cross legged in the bag! This is a staff favorite. Features:Spiral Stretch System (US. Patent NO. 7,900,301)Multi-tube construction with Flow Gate technologyHeat saving Tunnel HoodDraw cord for face hole adjustmentNeck Baffle: a shoulder collar to minimize air circulation through top of the bagAuto Locking Zipper to limit zipper slip during the nightRight zipper onlyDouble draft tube for increased zipper draft protectionTapered stuff sack with bias cut fabric to facilitate easier packingCotton storage sack includedTech Specs:[EN TESTED]25˚F/ -4˚C(Comfort), 14˚F/ -10˚C(Lower Limit), -21˚F/ -29˚C(Extreme*)*We do not advise consumers to reference the extreme rating for general use.800 Fill Power Goose Down12-denier Ballistic Airlight Nylon100 wash rated Polkatex Durable Water RepellantMax User Height: 5 10 Shoulder Girth: 57 -68 Knee Girth: 46 -55 Stuffed Size: 6.7 x13.3 Color: OG(Orange)[Weight] 2 lbs. 2 oz.[Fill Weight] 1 lb. 5 oz.

- Second Ascent

The MontBell U. L. Spiral Hugger #1 15 Degree Down Sleeping Bag is what backcountry skiers, mountaineers, and hunters can count on for bitter-cold nights. The unique Spiral Stretch System and feathery down lead to log-sawing nights and revitalized mornings.