This 12 Strand product from Yale is made of 100% orange solution dyed polyester. The strain is laid, much like Yale's 16-Stran roped, to maximize abrasion resistance. The brand is tight to prevent snagging but supple enough to make handling and throwing a snap. All polyester maximizes the tensile strength, while offering an enhanced ability to absorb shock better than most other 12 strands. Buzzz Line has a great feel for bootlicking, but the trade-off is that it's heavier than other lines, and not as friendly with prusiks and ascenders.