you can get them untied at -40

We treat these with a light wax coating so they stay tied and they're easy on your eyelets

15x stronger than steel

What are they made out of

no nylon filler

Unbreakable Boot Laces ship_sb you can get them untiedThe toughest laces out there. How? A polymer from a Nobel Prize winning scientist. Theyre lighter than cotton or polyester, and 15x stronger than steel, way stronger than Kevlar. What are they made out of? The same material as the US army's new bulletproof helmets. the polyester jacket keeps knots tied all day, no matter what. They're waterproof so they can't freeze, you can get them untied at 40. Plus they won't rot if you put your boots away soaking