Lets assume you can make a trainer in exactly the same way as Adidas do, can you stick Adidas on the side? No, it's a trademark. That's effectively what PGI is

Lets assume you can make a trainer in exactly the same way as Adidas do, can you stick Adidas on the side? No, it's a trademark. That's effectively what PGI is, and unlike patents and copyright, trademarks have a direct benefit to the consumer (they know what they are getting. Nobody is stopping people buying a Gutchy handbag, but the selling can't pass it off as Gucci) Same with "100% Florida orange juice" or "Idaho potatoes". I can buy "Southern Style Whiskey" and that's fine, but if I see "Tennessee whiskey" I am assured it's made in Tennessee. That may be important for me, it may not be, but I have the power.