How I Built This with Guy Raz

Warby Parker: Dave Gilboa & Neil Blumenthal

In 2008, it was nearly impossible to buy a fashionable, affordable pair of glasses online. That simple frustration inspired the idea behind Warby Parker – and disrupted the eyewear industry. PLUS for our postscript "How You Built That," an update on Bellyak, a kayak where you lie on your belly and paddle with your hands. (Original broadcast date: December…