That's a bit over the top. I'm a bit of a nerd when it comes to Boss pedals, so I'd actually wear one if it were a profesionally designed/manufactured item. If it were an official product, it may be cool, but in my opinion this item doesn't even look cool.
Word has it that this particular shirt was painted by David Gilmour and Robin Trower mixed the paint. It's rumoured that Eric Clapton was on his way with a bedazzler but got caught in traffic. ( A bedazzler for those who don't know is a device that places glittery rivets in cloth type items ) A true collector's item that is guaranteed to go up in value over time. But like you'd ever sell this treasure once it was in your hands. Into the safe deposit box!