Lawson Ironwire

When you're pitching a tarp or shelter in variable conditions, the cord holding everything taut matters more than most people realize. This accessory cord fuses High Tenacity Polyester with Dyneema SK75 to create a line that combines high breaking strength with minimal elongation under load. The result is a guyline that keeps tension where you set it, even when weather shifts or the ground moves overnight.

The fused construction means both materials work together along the entire length. Polyester contributes flexibility and knot-holding capability, while the Dyneema adds exceptional tensile strength and abrasion resistance without adding bulk. This hybrid structure also resists UV degradation better than cord made from a single fiber type, so the line maintains its performance through extended exposure to sun and weather.

Because the fibers are fused rather than braided around a separate core, the cord won't freeze into a stiff cable in cold conditions. It remains pliable enough to tie and untie even when temperatures drop, and the fused ends melt together cleanly without fraying. The construction also gives the cord significant cut resistance, which matters when you're working around sharp tent stakes or rocky terrain.

This cord handles the full range of shelter rigging tasks: main guylines for pyramid tarps, ridgelines for flat tarps, tensioning points for ultralight shelters, and replacement lines for worn-out factory cordage. The strength-to-weight ratio makes it practical to carry extra footage without noticing the penalty, and the low stretch means you won't wake up to a sagging tarp after a night of wind or rain.