- Jan 21, 2020 at 7:15 am #3628115
What is the approximate comfort rating for the Western Mountaineering Kodiak 0 degree bag, in your opinion please??
I’m using the discontinued REI Magma 10. ..for me, it’s a comfortable 30 degree bag without layers, liner, etc. etc. and “just adequate” at 15 degrees using liner and layers
Thanks!Jan 21, 2020 at 7:26 am #3628117
EN ratings for WM bags are hard to find and I don’t think I’ve ever seen one for the Kodiak, but I think if you find the 10* Magma only good to 30*, you might find the Kodiak good to 15-20*. Note that the Kodiak is a huge bag and I think the Magma is really narrow. If you want a little smaller WM bag, I’d get the Antelope with overfill.Jan 21, 2020 at 8:10 am #3628122
Also – what sleeping pad were you using? Don’t underestimate the impact of your pad on sleeping warmth.Jan 21, 2020 at 10:44 am #3628138
Good question on the pad! I’m using the NEMO Tensor insulated and was under the impression that it had an R value of 5, but that may not be the case!
Best!Jan 21, 2020 at 11:04 am #3628140
If it has an R-value of 5 you should be OK. The EN process assumes a pad R-Value of 5.
The Kodiak would be a really warm bag, you might find it good to 10-15* even. I just wanted you to note that it’s a really wide bag and if you’re on the slimmer side its internal volume may be hard for you to heat. Depending on what sort of temperature you really want to be warm in the Antelope with overfill is equivalent to most people’s 0* bags, or you could even step up to the Lynx or Puma if you really wanted a near 0* bag and sleep a bit cool.Jan 21, 2020 at 12:13 pm #3628145Rex SandersBPL Member
@rexLocale: Central California Coast
The Nemo Tensor Insulated is ASTM R 3.5, which might cut about 4° F from a bag’s effective EN rating.
The Nemo Tensor Alpine UL is ASTM R 4.8, which exactly matches the EN test specs. Compared to Tensor: +3 ounces, +$65.
Handy table of ASTM R-values:
Many, many variables determine how warm you sleep besides bag EN rating and pad R-values – no guarantees.
— RexJan 21, 2020 at 5:21 pm #3628186rOg wBPL Member
WM bags are right on the money as far as I am concerned. I use them in the winter without shelter but with a bivy. I have had a WM Antelope MF (5F) at 3F and slept like a baby. I have also had a Lynx MF (-10) down to -16F and slept perfectly.
I use a Prolite and a Ridge Rest and sleep with a thin Smartwool bottom and a Capilene T-shirt with a Cap 4 Hoody. Also Smartwool socks.
I have essentially traded both of the above bags for a single Kodiak MF and have all the confidence in the world I will be good down to 0F.Jan 21, 2020 at 8:41 pm #3628218
WM has had some of their bags EN tested but it’s a little hard to find hit their menu then go to FAQs you will find that the Kodiak is one of the few bags they have that WMs rating is not an EN comfort rating of you can fit in the antelope It would probably be betterJan 21, 2020 at 8:48 pm #3628220
Actually the comfort rating for both the Kodiak MF and Antelope MF are both +13Jan 22, 2020 at 5:07 am #3628252
Interesting – I never knew where to find WM’s EN ratings though I’d seen them for a couple of bags before from various sources. Great info Christie!Jan 22, 2020 at 8:03 am #3628263
Thanks, All! I think I will shop for a warmer pad; maybe the new valve Xtherm Max?
.dJan 22, 2020 at 8:17 am #3628266Jan 22, 2020 at 10:04 am #3628274
The XTherm yes but I had no beef with the old inflation valves they worked fine for me. The last year models have had some great sales. Does anyone know if the raise in R- value was a change in design or just the result of the new test methodJan 22, 2020 at 10:12 am #3628275
From my understanding no change in design (other than the valve). The increase in R-value is completely a result of the test method.Jan 24, 2020 at 9:38 pm #3628638Eric BlumensaadtBPL Member
@danepackerLocale: Mojave Desert
I’ve had my WM Megalite bag to +10 F. wearing medium polyester base layer and puffy jacket and pants in a TT Moment.
Then I had the Megalite overstuffed and now it’s easily good to +15 F. with just light base layer and light fleece balaclava. With heavier base layer and the puffy layer top & bottom I think it would be good to 0 F.Jan 25, 2020 at 7:23 am #3628656Richie SBPL Member
I’ve been toasty in a Kodiak at 10 degrees, but then I do sleep warm. I was doubled up on pads at the time with a ridgerest and I think and older downmat. I’ve always gone on the basis of taking a bag rated at least ten degrees warmer than the conditions you expect to face anyway.Feb 8, 2020 at 6:23 pm #3630498Stephen MBPL Member
@stephen-mLocale: Way up North
I had a Kodiak for a while and really liked it. As I have a Puma also I sold the Kodiak as the two were close in weight.
I think WM’s rating are realistic.Feb 9, 2020 at 5:43 am #3630521Link .BPL Member
“Does anyone know if the raise in R- value was a change in design or just the result of the new test method”,
Alan Dixon discusses that here Best Sleeping Pad for Backpacking 2020 | Complete Guide .Feb 9, 2020 at 5:46 pm #3630597BHBPL Member
You should be able to sleep in that bag at or very close to 0 degrees, unless you’re a very cold sleeper. I have the same pad (Tensor Insulated) and I was very comfortable at 19 degrees in a 10-degree UGQ quilt. I had it custom made with 950 fill power.
UGQ’s temperature ratings are legit, though. I thought WM’s ratings were accurate for comfort.Feb 11, 2020 at 12:07 pm #3630826Stuart .BPL Member
I’ve owned both the 6′ and 6’6″ version of the Kodiak. I’m a pretty restless sleeper and I like being able to move around inside the bag thanks to the extra girth. At 5’9″and 180-190lb, the 6′ was great, but I second-guessed myself having read that it’s a good idea to keep boots, water bottles, electronics, etc in the footbox of a longer bag in winter. Huge mistake. The 6’6″ bag was so much wider at the shoulders and hips that I couldn’t sleep anywhere near as warm as in the 6′ version. Too much dead air space to warm up.
I wound up buying the shorter bag back from the person I sold it to, as it was more than he needed. For me it’s been comfortable down to low single digits wearing thermals. If you’re built like a rugby player, the Kodiak is great. Otherwise consider a slimmer cut bag like the -10F Lynx. Side note: I wouldn’t suggest adding overfill to the Antelope to try to boost its 5F rating because the down has a higher likelihood of being compressed.
Generally I find WM are pretty accurate in their temp ratings – more so than other brands I’ve bought over the years. The Microfibre series bags are more comfortable for me than the Extremelite series, due to the improved breathability of the MF shell.Feb 11, 2020 at 7:23 pm #3630887Zack LBPL Member
If anything I would say WM is conservative in their temperature ratings. It’s a dramatic difference when compared to the more common bags found at REI etc.Feb 12, 2020 at 6:11 am #3630925Buddy BBPL Member
I have owned a Badger MF and currently own a Versalite and I tend to sleep cold, and both bags comfort ratings seem to be accurate for me with light base layer clothing, wool socks and a thermarest x therm ground pad.Feb 12, 2020 at 7:23 am #3630933bradmacmtBPL Member
I’ve owned and used 6 WM bags going back to 1992, and have found their temp ratings to be spot-on.
- You must be logged in to reply to this topic.