>>> welcome back to press here. i wear a jacket and tie because nbc asks i do. if i works for facebook, i would wear their uniform. mark zuckerberg may have made it famous, but now the hoodie and jeans are universal in high-tech. to that we can add shoes. these are in tech offices all over the bay area, the new york times says, in uncomfortable times silicon valley has turned to a comfortable shoe. this is it the first time i've had a shoemaker on the show. he started his career in biotechnology trying to turn algae into gasoline. he's turned into a beach of a cop letter, thanks for being with us this morning. all of a sudden, nobody is not talking about them, the new york times is running columns about them, and they just appeared out of magic air. how did you get so popular? >> we didn't plan for quite the amount of success that we had,