550 lbs break strength Type III Commercial Paracord Heavy duty Nylon - 7 inner strands with a woven outer sleeve 
Paracord is the strongest boot lace available! Hand made in the USA with USA made nylon and USA workers!

The "Greatlaces" brand is always 2 pair for 1 low price! American engineered 550 break strength. A larger than usual diameter shoelaces for strength, durability and comfort! proCORD™ Heavy Duty Round Boot Shoelaces are a soft, comfortable, large diameter 550 paracord bootlace reinforced with 7 inner strands of nylon. Standard lengths for all quality work shoes and boots. The large diameter assures comfort across the instep. 550 lbs. paracord assures a no break pull. Commercial Paracord is 100% nylon woven over nylon inner strands. This proCORD(tm) stitching assures a Rugged all use long-lasting shoelace. Hand fabricated with black steel tips crimped in 3 placed, assuring the aglet last as long as the paracord!