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MontBell U.L. Super Spiral Down Hugger #3

rated 4.5 of 5 stars
photo: MontBell U.L. Super Spiral Down Hugger #3 3-season down sleeping bag

Lightweight bag that's best for fall backpacking, although you can definitely stretch the usage of this versatile bag.


  • Super light
  • Awesome fit
  • Full body zip


  • Fabric is kinda sticky to the touch
  • Entry/exit is kinda weird

As with all Montbell products, there are no bells and whistles. They include what you need and leave off all the frills. This bag is a perfect example of that mentality. 

Montbell states that the temperature specs for the bag are: 40°F/ 4°C (Comfort), 30°F/ -1°C (Lower Limit), 3°F/ -16°C (Extreme). The bag stays true to its 30° temperature rating. With a liner and the right clothing, I've stretched this bag's rating down into the mid 20s. But as for the 30° rating, this bag certainly does its job.

I am 6'0'' and I ordered the Regular and I fit perfectly in this bag. Any taller though, and you would have a problem fitting. As with any mummy-style bag, you are usually cramped for leg and foot room, but Montbell has kept the bag super light but also spacious feeling. I don't ever find myself moving my feet around to get a good fit. I also have super wide shoulders but am not squished. It honestly feels like they've personally molded this bag to my body.

Entry and exit is relatively easy. It has a full zip with the option of the zip being on the right or left. The only problem I have entry-wise is the fact that its hard to zip up the bag all the way and then put your arms back into the bag. You can remedy this by using the inside zipper to zip yourself in.

Moisture protection is great. haven't ever woken up wet in this bag, although I have woken up to dew ON the bag due to a poorly ventilated tent. It has not soaked through. It is coated with Polkatex Durable Water Repellant.

The bag packs down to an amazingly small 5.5'' x 11''! You are hard pressed to find a smaller packed sleeping bag. It comes with a cotton stuff sack and a nylon stuff sack with cinches. The goose down the bag is filled with puffs up like a marshmallow when you take it out of the stuff sack. 

I have used this bag in mostly fall weather as it's too warm to even consider using it during the summer or late spring. I have also used this bag while it's snowing and down into the mid 20s with success and warmth. It has been with my on two 80-mile treks on the AT, 33.4 miles in the Cohutta Wilderness and 42 miles in the Smokies in the late fall. It has held up well over all this time of having it (about a year now).

Source: bought it new
Price Paid: $199 USD (on sale)

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regular long
Price MSRP: $294.00
Historic Range: $197.40-$338.95
Reviewers Paid: $199.00
Weight 1 lb 5 oz / 600 g 1 lb 8 oz / 680 g
Fill weight 10 oz / 280 g 11 oz / 310 g
Temperature rating 30 F / -1.1 C 30 F / -1.1 C
Fill 800 fill-power down 800 fill-power down
Shape mummy mummy
Max user height 6 ft 0 in / 180 cm 6 ft 6 in / 200 cm
Shoulder girth 53 - 75 in / 130 - 190 cm 57 - 81 in / 140 - 210 cm
Knee girth 44 - 62 in / 110 - 160 cm 47 - 67 in / 120 - 170 cm
Price $294.00 USD $314.00 USD
Product Details from MontBell »

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