Update 3/28/17: I did not return the binder, as I have found it to be a suitable alternative to wearing a sports bra while at the gym. The fabric is very thin and allows air to pass through easily, unlike most sports bras. However, there is noticeable bounce while running with it on…
Your mileage may vary, of course! I’ve also attached binder comparison photos below if you don’t want to go through the entire four-minute video (apologies for the dirty mirror and my stubby neck!).
“Naked” Binder/Bra Comparison
Clothed Binder/Bra Comparison