Arbor-Plex was the first synthetic rope designed specifically for the arborist industry and remains one of the best values in climbing lines today. Arbor-Plex has a weave of polyester and polyolefin fibers that make it incredibly light weight and very mildew resistant. The 12-Strand weave is naturally twist resistant, and signature green stripe assures that any twist in the line is easily detectable. Rope has a nubby feel when new, but it quickly "furs up" with wear and tear. It has excellent knot-holding ability and works well when wet.