Problem description
There are noticeable lines running from the armpits up towards the back of the collar. Generally, this will be most noticeable when the shirt is worn buttoned all the way up. This is frequently a problem with folks who lift weights and have more developed trapezius muscles. Others, with wider shoulders that pitch downwards at the end may also find these lines developing.
How it should fit
Ideally, the shirt should drape flatly across the upper chest without any lines pulling or puffiness. For this aspect of the fit, you will want to consider if this is a problem only when the shirt is buttoned all the way up, and if that is how you will primarily wear the shirt. Also, it’s common for the left and right shoulders to slope differently. In this situation, you’ll want to find a Shoulder Slope setting that is a happy medium for the two shoulders.
Problem solution
To reduce these lines you will want to Lower the Shoulder Slope on your shirt size. If you have no shoulder slope adjustment selected, go to Lowered Shoulders -0.2″, Lowered Shoulders -0.6″, or Lowered Shoulder -1.0″. If you had a ‘Raised’ Shoulder Slope adjustment selected you will want to reduce that back to the “Standard” setting, or move it to a Lowered Shoulder Slope adjustment.
How the adjustment works
Changing the Shoulder Slope setting on your size changes the elevation of the shoulders relative to the elevation of the collar. Changing the Shoulder Slope from “Standard” to Lowered Shoulders -0.2″ will lower the shoulders by 0.2″; adjusting Shoulder Slope from Lowered Shoulders -0.2″ to Lowered Shoulders -0.6″ will lower the shoulders by 0.4″; and adjusting Shoulder Slope from Lowered Shoulders -0.6” to Lowered Shoulders -1.0” will lower the shoulder by an additional 0.4”.