11. Inside-out suit
If we're being completely technical, this suit and the upgraded suit are one and the same. But given that they look absolutely different it's only fair they get two separate entries on this list. Unfortunately for the inside-out suit, it ranks lower than its more-than-awesome counterpart. Not to say this design looks bad by any means - there's something really special about the black and gold color palette covering Spidey as he swings through the night sky. But let's not pretend that the only reason this suit was created wasn't to sell more toys.
Granted, you could say the same about other costumes in this list (looking at you, Integrated Suit), but at the very least those have both a better reasoning behind their creation and a design that tries a little bit harder to be something unique and special. This is just a change of colors with a few cables popping up that came to be because someone threw paint at Spidey. In a movie so packed with iconic characters and special moments such as No Way Home, this design is one of the few aspects that didn't manage to be memorable whatsoever.
No one left the movie theater thinking "Man, that inside-out suit was one of the best things about No Way Home". On the contrary, the very same thought did cross many fans' minds when talking about the classic costume that Tom Holland wore at the end of the film. It just goes to show that the love and care that was put into creating that final look for the wall crawler wasn't there when it came to this excuse for more merchandise. You could completely remove it from the movie and nothing would change at all.
Still, we can't deny the combination of colors looks gorgeous. This suit may be just an eye candy, but at least it succeeded in that aspect.