Un-laces

I wear boots. Safety boots mainly. I like boots. But undoing the laces is a bit boring. Sometimes I see people with big boots, and many many many many holes to lace and un-lace. Those people must waste nearly half their lives lacing and un-lacing. (Disclaimer: Actual time may vary. Estimates based on hole/lace friction, weather conditions, dubin co-efficient, and finger dexterity. Author makes no representation as to its accuracy or validity, and may not actually wear boots.)

I propose a new style of shoe-lace, which acts similar to a vertical blinds pull-string system ==> One set of ends does up your shoes/boots/garter/ice-skates, and the other ends undoes them. (The ends that un-does them will actually be retracted during normal operation, with only a pull-ring protruding, or perhaps a lawnmower-style pull-start handle).