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T-Limit query on my new parka? MH Absolute Zero
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Home › Forums › Gear Forums › Gear (General) › T-Limit query on my new parka? MH Absolute Zero
- This topic has 2 replies, 2 voices, and was last updated 5 years, 4 months ago by Edward John M.
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Nov 19, 2018 at 1:35 am #3564772
I admit to being a little arithmetic challenged on this question.
But in the XL size with 610 grams of 850FP treated down. Assuming I wear the following layers underneath.
Base layer. The Patagonia Everyday long sleeve + a Patagonia Cap2 T-shirt + my Montane UL windshirt
Patagonia Grid fleece hoodie and possible a matching windproof
Possibly also the Patagonia Nano-Bivvy as it does fit inside easily
Nov 19, 2018 at 8:50 pm #3564872If Mountain Hardwear’s naming is accurate, then you should be good to -459 F.
In seriousness though, 610g is 21.5oz of 850 FP which is equivalent (roughly) to 22.8oz of 800 FP down. That’s a lot. That’s the same as my winter 0F rated sleeping bag, but spread over just your torso instead of your whole body. Plus you’d presumably be more active when using it, then I am in my sleeping bag. I think you’d probably fair pretty well at -40F presuming the rest of your outfit was appropriate.
For another point of reference, my winter parka has 6-7oz of high end down and I’m pretty happen using that to about 10F.
Nov 19, 2018 at 10:40 pm #3564900The torso has a greater loft than the sleeves in this parka so I was hesitant to simply use the free loft as a direct guide and I think my Clo calculation of ~ 12Clo is/was way off. This parka is only an XL so I am limited in my midlayers to the R1 hoody plus something about as thin.
Something this big replaces two or three of the layers in a traditional system so I’m not quite sure how to dress for my trip if I’m going to rely on this for my static layer.
I purchased partly because the price was too good to pass on, and I could find nothing that would fit over a Patagonia DAS except for the PCU L-7 over parka I already own but people were telling me was very heavy for the weight/warmth ratio
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