hot take: oglab’s “warmth” scores on down jackets are straight-up flawed math. they weigh total fill (good) but ignore torso coverage volume. technically, loft efficiency = (fill wt * fp) / (chest circ * height adj), where fp is fill power in ci/oz. rab mythic ul’s 3.5oz @ 850fp crushes their top pick’s 4oz @ 800fp by 15% on that metric-yet they rank it lower cuz of pack size bs. under the hood, it’s baffle volume that matters, not scale weight alone. who’s running their own calcs?