No stretch for me to, I've rarely had my boots become tighter during the days hunt. Usually have to stop a time or two and tighten things up. I purchased laces that are Kevlar and love them, no stretch and the bow knot stays tied all day no problem. Can't remember the brand name. I also lase my boots in stages, just above the eyelet lace holes I tie an over hand knot and cinch it down then continue up the speed hooks..............works for me.