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Seamless Down Hugger 900 #1 Long

Style #1121352

  • 15℉

Price: $639.00

Member Points: 6,390

Since 1975, Montbell has been innovating and creating better outdoor sleeping experiences with our sleeping bags. The Seamless Down Hugger series came about when we asked ourselves “How can we improve the down's ability to insulate?" When fully lofted, down traps air which provides insulation. The more air in the sleeping bag, the better it insulates. We began scrutinizing the elements of the sleeping bag that affect lofting ability. An idea proposed was to eliminate the baffles. Without baffles, the down would be unhindered and could loft to its fullest potential. But baffles prevent down from shifting and developing cold spots. Our next hurdle was developing a baffle replacement. Mother Nature provided inspiration and we developed a specialized thread called Spider Yarn. By placing a web-like layer of polyester yarns throughout the bag, we created a system that traps down and holds it in place. The "Spider Baffle System" was successful in maintaining a set amount of down, though a majority of the down is still able to move freely inside the bag. Although we’ve eliminated most of the exterior sewing lines, the interior features gathered quilts and elasticized stitching to promote comfort. By designing the sleeping bag in this way we’re able to reduce the amount of down used in the sleeping bag while maintaining the same thermal profile. This reduces some weight and provides a better value to our customers.


OG (Orange)



Updated 05/15/21 15:35 (EST)


  • Spider Baffle System (Patent pending)
  • Inner: Super Spiral Stretch System (US. Patent NO. 7,900,301)
  • Two way right hand zipper (59 in / 150 cm)
  • Anti-snagging slider cover
  • Tunnel Hood (limits exposure of your head helping keep in warmth)
  • Neck Baffle
  • Hood Adjuster (Draw cord for face hole adjustment)
  • Draft Tube (covering the zipper to shut out cold air)
  • Auto Locking Zipper (to limit zipper ”slip” during the night)
  • Triangle Gusset (Reinforcement at the end of the zipper)
  • Storage / laundry net sack included
  • Stuff sack included (Tapered, bias stretch stuff sack for easier packing)


Weight1 lb 14.8 oz (872 g)
Insulation900 Fill Power EX Down
MaterialShell & Lining: 7-denier Ballistic Airlight nylon
Spider Yarn: 100% Polyester
DWRStandard DWR treatment
Compressed size∅6.7 x 13.3 in (∅17 x 34 cm), 6.8 L
Country of originVIETNAM
OtherISO TESTED: 28°F / -2°C (Comfort), 17°F / -8°C (Lower Limit)
Max User Height: 6 ft 6 in / 198 cm

<Montbell sleeping bags stretch>
Shoulder girth when relaxed: 63 in / 160 cm
Shoulder girth when stretched: 82 in / 208 cm
Knee girth when relaxed: 53 in / 134 cm
Knee girth when stretch: 69 in / 174 cm

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Actual color may vary.

Baffleless Construction

How to wash & dry - Seamless Down Hugger 900 -


Down Sourcing


At Montbell, we source down from both the European and Asian markets to satisfy a variety of characteristics (supply/availability, low cost, consistent quality, humane practices, etc.) and maintain our lofty standards. Every season we seek to balance the superior quality for which we are known and the lowest possible raw materials cost. We change down sourcing companies frequently to insure that our customers have access to superior products at the lowest price possible. In the course of these efforts, Montbell never purchases down from operations that practice “live-plucking” methods. We only utilize down plumes and feathers collected as a by-product of water fowl raised to meet the demands of the food industry.

We will continue to look for sources of down that maximize value to our customers and allow Montbell products to perform at the highest level.

ISO 23537


Montbell Sleeping Bag


Sleeping Bag Guide

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