Simply put: they're awful. You tie them and within roughly three minutes they're untied again. There's no stopping it! I suspect that dress shoe laces have a coefficient of friction even lower than that of BAM.[1]
We can put a man on the moon and fling a satellite out of the solar system, so why can't we make dress shoelaces that stay tied?
Notes:
[1] Its friction coefficient is 0.02, half that of Teflon. See http://en.wikipedia.org/wiki/BAM_(material).
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