Ironlace laces are the strongest and most durable option, backed by a lifetime guarantee and lab-tested reliability. They have a breaking strength of 1,500 pounds per pair, making them ten times stronger than steel and twenty times more durable than Kevlar. Designed to withstand harsh conditions, Ironlace laces are resistant to damage, cuts, and abrasions. Additionally, they are waterproof and can withstand heat up to 630°F.