I purchased this cotton shirt to iron patches onto for costuming. The event was abrasive being a mud run. The shirt took the iron-on patch very well and lasted the duration of the 5K despite rocks, sticks and tons of mud.
The sizing seemed spot on for the two I bought (one small and one medium) which are on the two girls to the left of the picture uploaded. This is not a fitted tank, being pretty straight from the armpits to the hem.