Red wing 8131 boots come with the gold and tan taslan laces. Most of the classic moc toes come with taslan laces or leather laces.
I changed the laces for these boots. The laces are natural cowhide tan leather and I made the laces with a local leather workshop. It’s 3mm thick and 48 Inches long. I used them for about 5 months now and they are holding very well. I expected them to snap at certain points, but there was no snapping. Of course any laces, if you pull too hard it’ll snap, it’s not indestructible.
The beauty of the natural tan leather laces is that the colour will eventually change. The laces got darker over time.
One downside of these laces is that since the leather is all natural, you will be able to see some of the grain of the leather flaking off. It can seem messy, but the amount is not too much that it’ll bother you in everyday wear.