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Montbell sleeping bag question
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Andrew Manies
(amanies) - F

Locale: SF Bay Area
Montbell sleeping bag question on 11/29/2012 10:08:23 MST Print View

I realize this topic has been discussed extensively elsewhere on this site, but I'm hoping to get direct feedback from owners of Montbell sleeping bags, specifically the UL SS Down Hugger models #3 and #1.

By way of brief background, I have tried for the last few months to find a #3 (2012 model w/11 oz down fill) with all its baffles filled properly, and have so far been totally unsuccessful. I love everything else about the bag, but cannot understand why each and every one I have received (4 so far) has had at least two baffles almost completely devoid of down.

To the owners: How did you find bags with all baffles filled – did you go to retail stores and check their stock until you found one that worked? Did you just get lucky via an online retailer? And if the baffles aren't filled properly, how do you avoid cold spots? Do you make sure that side of the bag is against your insulated sleeping mat/pad?

I'm sure some people may interpret this post as inflammatory, and I apologize if it seems so. I'm just thoroughly confused about how Montbell gets so much praise (imo deservedly) for their insulated jackets and other apparel while seemingly dropping the ball in the construction of its sleeping bags.


michael levi
(M.L) - F

Locale: W-Never Eat Soggy (W)affles
Re on 11/29/2012 11:13:25 MST Print View

Nothing is perfect, just send it into someone who can stuff some more down in a few baffles, and therefore boost its rating.

Mike W
(skopeo) - F

Locale: British Columbia
Montbell sleeping bag question on 11/29/2012 13:15:01 MST Print View


Edited by skopeo on 09/08/2015 15:38:25 MDT.

Andrew Manies
(amanies) - F

Locale: SF Bay Area
Montbell sleeping bag question on 11/29/2012 14:16:39 MST Print View

Hi Mike,

Thanks much for your thoughtful reply. I'm heartened to read that you and your son have both had positive experiences with the bags down to their intended temperature ratings.

I should clarify a few points:

1) When I've found thin spots, it's been by holding the bag up to a bright light source without stretching the elastic thread.
2) I wrote that the baffles were "almost completely devoid of down", not entirely devoid. There were still perhaps 10-12 small tufts of down in the baffles in question.
3) Most important, though: I cannot re-distribute the down to these thinner sections of the bag. My understanding is that with its SS bags, Montbell doesn't use continuous baffles, but rather uses six chambers per baffle (top and bottom). These chambers seem to me to be sealed from their neighbors, as no amount of fiddling could shift the down from one section to another. Are your bags manufactured differently, or are you using the non-Spiral Stretch models?

I'm not expecting perfection in any piece of backpacking gear, but as you wrote, this problem seems like a rather persistent manufacturing flaw.


Mike W
(skopeo) - F

Locale: British Columbia
Montbell sleeping bag question on 11/29/2012 14:34:17 MST Print View


Edited by skopeo on 09/08/2015 15:37:33 MDT.

Rick M
(rmjapan) - F

Locale: London, UK
Re: Montbell sleeping bag question on 11/29/2012 23:55:22 MST Print View


Edited by rmjapan on 06/19/2015 08:50:31 MDT.

John Abela
(JohnAbela) - MLife

Re: Montbell sleeping bag question on 11/30/2012 04:19:40 MST Print View

Hey Andrew,

I have owned a MBULSS #1 and #3 and have spent way more time than I should have trying to find a #2.

Mike pretty much nailed most of my thoughts in his above post.

I was also going to mention these thoughts:

You said you have tried four of them so far. Have you actually ordered four MBULSS backpacks and then held them up to a light and all four of them had baffles with zero down inside of them?? If so, that is something that should be made aware for others to check their own bags for. If that is the case, did you buy all four of them from the same shop in SF or did you buy them from online companies (same one, different ones) or did you get them direct? Basically just trying to hunt down if you have had a series of four from the same manufacturing run.

Regarding "the baffles aren't filled properly, how do you avoid cold spots".

Well as Mike said above, the MBULSS is not your traditional sleeping bag... the baffles are not going to be 100% filled with down. A number of my baffles are not even 10% filled with down, but because of the way that the baffles overlap each other when you are inside of it, it does not cause cold spots.

"I'm sure some people may interpret this post as inflammatory" -- by on means. Totally legit questions and ones I asked myself the first time I put my first MBULSS up against a light.

Sam Farrington
(scfhome) - M

Locale: Chocorua NH, USA
Montbell sleeping bag question on 11/30/2012 18:57:43 MST Print View

After reading the review on this site, bought the spiral down hugger #3.
It remains perfectly filled with just enough down to fill out all areas of the bag.

Then came the reviews, posts and articles about the 'super' spiral line, and thought I had really missed the boat.

Since then, however, there have been a number of posts suggesting, like yours, that the supers don't completely fill out. Not sure what is going on here. There was an article here that compared, or at least had data on both the regulars and supers; but it did not fully resolve the issue.

At any rate, am happy with the not so super bag, never compress it except when carried in the pack in a large stuff sack with no compression straps, and when it gets rank, will launder it with Sportwash on the sweater cycle, and dry very slowly in the dryer with tennis balls. So far so good - much more warmth for weight than the synthetics used previously. With BPL cocoon PG top and bottoms, plus Thinsulate booties over sox, and BD fleece top and hat, it is comfy down to a few degrees below freezing; mid to high twenties, in other words.