Most T-shirts are a waste of time - at least in what they say. I have a few that fit in this category. I'd rather not get into any specifics.
I just stumbled upon a T-shirt that I actually like. The shirt accurately describes the spiritual state of the human heart both before and after God's work of regeneration. It even includes scripture references. As a bonus, because the shirt looks interesting, it is bound to lead to questions and conversations - hopefully with lost people.
The shirt is offered by Monergism. Click here to look at product details.
Below are the shirt and a picture of the regeneration image (click directly on the icons to enlarge).