Nike ,
offres mercurial vapoMercurial - In The Field 
 
Question: How can you see it the shoe is a steam or a vapor. I can't see the reformation. Can someone tell me the difference?
 
Answer: Vapors - Made of Teijin imitation leather
 Steam - Made of lower quality synthetic leather
 
 Vapors have trivial stripes on the tip
 Steams tend to be simple and shiny