I use 100% Cotton shirts. And the designs are a good quality Vinyl.
They do not peel off after washing. Very durable.
What about something personalized, like this?
Now that, with a qr code on the back would be fucking sexy. That's something I would buy.
Haha, Well i can definitely do that for ya!
9.99$ in btc + Shipping. Anywhere in the world :p
It'd more than likely end up something like this...
But the coin would have better definition.