Now, making a comparison to a mainstream commodity option requires a little work on the back of an envelope.

FORBES: Magazine Article

As the work came in, Herman pushed the fashion envelope, introducing polyester blends to McDonald's, knitwear to FedEx and cuffless shirts to the casinos of Las Vegas.

FORBES: Mr. Uniform

Miners who work for Murray are sometimes forced to push the envelope when it comes to safety, he said, and are afraid to speak up for fear of being fired.

CNN: Camera lowered into mine cavity shows 'survivable space'