T-shirt Teacher says:

High knees! Two, three, four, and Squat! Two, three, four, and Kick! Two, three, four…

Tag:  gone

Era:  early 80s

Fabric:  50-50

Size reads:  S

Measures:  17 inches across the chest, 26 inches back collar to hem

Colors:  faded red shirt with white Aerobics Beyond Control print

Condition: great vintage shape, slight darker spot on front left adds charm, soft and thin, stretchy and smooth

For reference, Easy AE over there is 5-10, and feels like cannons in the overture of 1812.