There are a few different versions of the Ralph Lauren logo. The typical Ralph Lauren logo consists of words 'Ralph Lauren' separated by a polo player on a horse.
Polo by Ralph Lauren
Polo
No, actually, they're not. Ralph Lauren and Polo have a similar logo, though.
Ralph Lauren Polo!
Polo Ralph Lauren
Ralph lauren
two guys playing polo
Ralph Lauren
Ralph lauren
No, but Ralph Lauren simply sells polo shirts (hence the small polo icon on each shirt).
Oh, dude, a Ralph Lauren Blair shirt is like a fancy button-up shirt designed by Ralph Lauren. It's probably made of some nice material and has the classic Ralph Lauren logo on it. People wear it when they want to look all dressed up and stuff.