Mack Weldon Quarter or Half Zip mock neck cotton spandex M

Soft comfy versatile cotton blend Quarter or Half Zip mock neck from Mack Weldon! This looks like the Atlas half zip, but is 95% cotton and 5% spandex, rather than polyester. I am not sure of the style name, maybe somebody knows and can clue me in?! Long sleeves, quarter or half zip, mock neck when zipped, 2 side zip pockets. Size M (lying flat approx pit to pit 21”, length from top of right shoulder to right front hem 26.75”) Good preowned condition GUC Color: blue 95% cotton 5% spandex Machine wash cold Stock photo of similar item to give a sense of how this side cotton quarter or half zip mock neck in blue from Mack Weldon might look on you!