Trying to figure out sizing of the new Montbell Thermawrap women's jacket for my wife, when sized large enough to use as a belay-type jacket over layers (typically one size up is enough). Montbell sizing can sometimes be all over the map because of Japanese-European-U.S. sizing models, though their products are very high quality.
I size my last year's Thermawrap Parka 1 size larger as I like to use it as a belay-type jacket for rest stops or in camp. I'm 6 ft tall 185 lbs 42 in. chest and a Large would have fit me snuggly over a baselayer and under a shell. My XL fits over a thin merino baselayer (Ibex Pacifica), R1 hoody midlayer and thin wind shell (Patagonia Houdini), light soft shell in winter (Patagonia Ready Mix) or thin rain shell (Montbell 12 oz)? My wife wears the same layers.
Cuffs on the latest model are supposed to have an elastic wedge, as do the sides of the hem. If sized up one size, would this still fit over thin base, light R1 midlayer and thin/light shell?
For a belay type fit on the older jacket my wife would wear a men's Medium. For the new women's Thermawrap Parka, would she have to size up to a women's Large to get a 1 size larger fit (she's 130lbs, 5 ft 6, size 8, usually wears a women's medium in tops)?
