i just bought a pair or korker boots that have stainless steel laces and no knots (there is a locking ratchet thereon). too new to know if I like that system or not .

other suggestion is to replace the double knot you are using with what used to be called a hikers knot (my son used it on his wrestling shoes) . when you tie your conventional shoe lace knot, instead of running your loop through the center hole once , do so twice. it will not loosen/untie under all but extreme conditions, yet it will untie at the end of the day by pulling on either tag end. HTH.

garthman