its just regular wire, that is shiethed in flexo-pet nylon chafing tubing, and then braided because +\-\common for 120vac.
ive seen tests done on things like that... "power cords" that are supposed to supply better dirty 120vac to a home audio power rectifier (if thats the right word) like those monstor cable power grids that clean the power and whatever...
and there was like .05v difference. its supposed to magneticall shield and balance the output bla bla bla.