Neil Blumenthal and David Gilboa
40u40 retailers neil blumenthal david gilboa
Gilboa (left) and Blumenthal (right)
Age: Blumenthal, 32; Gilboa, 32

Co-founders and co-CEOs, Warby Parker

Neil Blumenthal and David Galboa are reinventing how we buy cheap, stylish specs. Their eyeglass maker, Warby Parker -- named after two Jack Kerouac characters -- sells retro-chic designs for just $95 through a sleek website with a home try-on program and pain-free returns. Sales are up 200% so far this year, and the company, which donates one pair of glasses to nonprofit partners in developing countries for every pair sold, has donated a total of 300,000 pairs since the company's launch in 2010. Coming up next: shipping outside North America and a flagship retail store in New York's SoHo district. "It's been a whirlwind," Blumenthal says.

--Alex Konrad

- Last updated October 11 2012 04:33 PM ET
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Fortune's 40 Under 40

Who are 2012's young business stars? We've got the CEO of a blue-chip beer brand, an airline CEO who just placed the largest order in commercial aviation history, and Warren Buffett's new prodigy, among the Silicon Valley hotshots and others.

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