80s Navy Thermal Long Sleeve Undershirt Small Medium

Vintage 80s shirt in navy blue with long sleeves. Condition: Very good vintage with light general wear, has some light piling throughout and has a small mend on a sleeve. See photos. Size label: Labelled Medium, but runs modern Small to medium Tag: Sports Afield Material: 100 Polyester MEASUREMENTS Taken from seam to seam while the garment is lying flat. Double the armpit, waist, and hips. For reference, model is 5'5" and measures 31-26-36. Length from Top: 28" Armpit to Armpit: 16 to 19" Waist: 14 to 16" Shoulder to Shoulder: 15" Sleeve: 23"