John S.wrote a review of Rab Xenon-X Hooded Insulated Jacket - Men's on December 11, 2016
Fit: Runs large
I own lots of Rab clothing as I'm 6'4" 175 and their size large fits great- long arms and an athletic fit in the midsection. If you're tall and slim u know what I'm talking about... I expected the same with this jacket but was disappointed to find the fit more "regular" and not slim fitting in the mid-section thus greatly reducing its thermal ability (I've learned my lesson with other brands). I returned it. However if you looking for a synthetic jacket, this one has been voted the #1 synthetic jacket by Outdoorgearlab for the past several years so I have no negatives against its quality/thermal ability.