I got a couple pairs of these Kevlar laces on Amazon. One set got me through two pairs of Danner boots over about three years with heavy use. They're still fine functionally after all that, they are just a little funky looking. Definitely very happy with them for the price.

GREATLACES Heavy Duty Kevlar Reinforced Boot Laces Shoelaces (Tan W/Black) 2 Pair Kit https://www.amazon.com/dp/B01JES1V1K/ref=cm_sw_r_apan_glt_fabc_TD53T4BN7PZBZYGR4DTS?psc=1