Love the style & design details!! Inner shell liner snaps discreetly into the inside of the top at shoulder to stay in place. Slightly short to regular in length (I tend to prefer slightly longer); however, unfortunately the sleeve detail has very tight elastic. For reference, I am an athletic hourglass build between a 4/6 but don’t lift weights...I have never experienced an arm being tight before. In this style, would recommend sizing up. Highly recommend overall!