Vintage T-Shirt Forum & Community Authentication Appraisals

Hi, I recently found this RHCP tee and it is definitely vintage, the tee is super thin and feels early 90s. I found it at the rag house and there's no reason for it to be fake. I am wondering if it's licenced to Giant, why doesn't it have a Giant tag? And did Giant print on super thin cotton type tees such as this? Thanks in advance!

Being discovered at a rag unfortunately is not a signal of authenticity. Many people have found fakes at the bins, on thrift shelves, etc.

That said, a quick glance it looks okay - what is that tag? I was only able to find one other one like this in black, but it didn't have a back.