If you have seen Chuck then you know his he also uses Charles Carmichael as an alias.
And after he left the CIA he started a business for himself (and his friends) calle Carmichael Industries and this is the t-shirt that they have at Carmichael Industries.
This dark t-shirt is simple and just has the Carmichael Industries logo on the right side.
Of course this Chuck t-shirt comes in different styles and even some other colors.
Read More About The Carmichael Industries T-ShirtArray