Lace up with Castle Brook Paracord Bootlaces. These are some seriously tough laces. Castle Brook pulled all the stops to craft what they claim are the toughest bootlace. Each pair is handcrafted using seven nylon strands, 550lb tested nylon Kernmantle rope, and industrial strength fused polyolefin aglets. You won’t be getting any of those frayed laces from Castle Brook’s aglets as the polyolefin chemically binds to the nylon fibers making for a uniform and flexible lace end. Not only are these crafted to be the toughest laces, the guys at Castle Brook are standing behind their product with a lifetime warranty. Available in multiple sizes and six colors. Get your pair here.