Born to Run

http://www.google.com/patents?id=sU0fAAAAEBAJ&printsec=drawing&zoom=4#v=onepage&q=&f=false

Three-legged pantyhose, patented by Annette Pappas in 1998.

The third leg is folded into a pocket until you get a run; then you rotate it in.

Or you can use the whole thing as a bagpipe warmer.