i bought my friend a peak XV jacket for xmas to use on our aconcagua trip, i had tried on a few jackets incl a mhw sub zero parka, i have a north face himalayan jacket, the peak xv seems pretty close to my jacket, and way above in the quality and warmth of the sub-zero
my only gripe is that it does not have a proper water bottle pocket, the pocket they have you could not fit a nalgene or 1 liter bottle in
btw it is 850 fill per whittaker mountaineerings site