-I always Obenauf my leather laces
-The left lace snapped twice (in different locations, eyelet-wise), the right once.
-These were on an all-eyelet pair of Semi-Dress just a couple of months old. Part of the reason I put in the oiled leather laces was they do grip better, leaving a tighter fit that would've been better for finishing off this break-in.
The funny part is, when I travel I generally pack a spare boot lace, "just in case." Didn't this time because I had literally put them on the night before my flight and figured, "They're brand new! Thick-ass leather laces! I'll be in a city! At museums! What could happen?"