I'm guessing it's just a standard/premium Gildan T-shirt with the Animal logo printed on which makes it cost 3x as much.
They're actually cool looking shirts, you have to respect the aesthetics of the Animal branding but I would feel like one of the Tapout kids wearing it since I'm natural and don't even look like I lift in a t-shirt. The Animal youtube channel puts out a lot of informative videos too like this one..