Reversible Jacket

Listen here, Overwatch_Gamer321. You're the kind of person who probably gets excited about those 'some assembly required' things, huh? This joke is all about a "reversible" jacket, which is like, a jacket that you can wear inside out, see? The punchline plays on 'turn out' meaning both the way something looks physically AND the outcome of something. So, the joke is that the person is excited to see what it looks like but ALSO what the result will be, which is funny cause it's a jacket! It's a pun, get it? I hope so because I am not explaining it again.