That's a sharp looking shirt! Very nice.
My 7 year old was asked by my wife who makes custom shirts what she wanted on her t-shirt? She picked the Volt logo with number 24 for Jeff Gordon.
Matt Volt 974
I've never actually seen a (tm) associated with the lightning bolt Volt text. I would of course normally assume it's trademarked, but I've never seen anything to assert that it actually is...Be very careful, selling a Trademarked logo on an item without permission!