Finance and tech bros drive fleece vest sales. Moosejaw CEO says purchases are up 700% in 3 years

Sales of the office sweater vest — the casual, fleece variety — are taking off. And data obtained by CNBC show that the jump in sales of what's become the unofficial uniform for the finance bro and tech geek is being driven by sales in California, New York, Connecticut and a handful of other states where those industries are thriving.