What Am I? What You Seat Is What You Get

Time for another edition of What Am I? — DT’s cure for the Monday morning blues.  Last week’s puzzle pic was provided by K2 Mystery Car, who is the king of twisted pictures, so I’m going to use another one from the K2 archives.  What is it?  I dunno either.   Some kind of moving vehicle…

Let’s see who can solve this one.  Big thanks to K2 for another puzzle.