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Paleo Dieters Who Want to Sleep in Caves Lift a Window-Insert Maker

Sam Pardue
Sam ParduePhotograph by Christian Columbres for Bloomberg Businessweek

Serial entrepreneur Sam Pardue started Indow Windows because he was worried about global warming. He never thought people would use his product to simulate sleeping conditions from before the Bronze Age.

Founded in 2009, the 18-employee Portland, Ore., company’s window inserts are a new twist on storm windows. Instead of bolting on the outside, they squeeze into the frame on the inside, held in place against existing windows by squishy silicone bumpers that line the edges. And instead of glass, they’re made of clear acrylic that has been measured by laser to fit old, crooked sills. Putting them in and taking them out is meant to be as easy as pulling up a blind.