Just received my Momentum Fleece yesterday. FANTASTIC fit! This really is a "Performance" fit and hugs the torso all the way down to the waist! I have an athletic build and have found that some outdoor clothing manufacturers claim that their clothing is fitted but it only "fits" those with slightly generous figures around the mid section (sorry, but you know what I mean! :-)) This has left me with gap at the bottom where the wind can get in. But the Momentum is PERFECT. It's not bulky but is still a nice mid layer. Fit is great in every respect, sleeve, waist , length down back and width across the back. I purchased the Medium as I compared the measurements to those of the other base/mid layers I have (in particular Berghaus MEDIUM) and I could not have chosen better. I am already ordering a second one of these to keep up.