Don't worry about the other guy.
Let's solve your problem.
You purchased electronics. You got a Nike Jacket.
Open an Not As Described Dispute with eBay.
You may be sent a Return Shipping Label (or not). If you are use it and return thejacket.
When it is received you will be refunded.
Don't get involved with who is at fault.
Just get your money back.
Note. If this went through eBay's eIS program it is possible that they will not ask for the return of the jacket.
It becomes yours to wear, donate, or present to your kid -or grandmother- as a present.
EBay has a MONEY Back Guarantee.
Make sure your Claim is for Not As Described.