It really depends on your budget not the shirt or its use.
When dh was making 100k a year I spent more than $35 a week on coffee..it would have been nothing to buy that shirt.
Now he is unemployed and $35 will feed my family lunch and dinner for 2-3 days. No way I am spending that kind of money on shirts now. (I felt guilty about a $5 shirt a few weeks ago.)
If you are comfortable with the spend then keep it, if not then it was not meant to be.