Don't tattoo yourself. Unless you buy this sweatshirt and learn about bloodborne pathogens. Be safe and have fun my fellow degenerates. 
Quality matters. For tattoos and for tattoo related shirts.
.: 80% cotton, 20% polyester fleece with 100% cotton face (fiber content may vary for different colors)
.: Medium-heavy fabric (8.5 oz /yd² (280 g/m²))
.: Regular fit
.: Tear-away label