coal black 550 paracord with black steel tips shoelaces boot laces strongest laces available - (1 pair pack) (60 inch 152 cm) sport28 paracord boot laces are the strongest laces available! 550 paracord has a break strength of 550 lbs and these have a double crimped steel tip for a great looking appearance! the steel tip is black nickle plated for long lasting and rustproof performance.