Biothane ® is the perfect alternative to leather. These tracking lines look and feel like leather and are rugged enough to withstand tracking in the worst conditions. You can drag them through water and muck and simply wipe them clean in seconds when you are done. Its durability is superior in that it will never crack, rot or stretch, even when used under the harshest conditions and in the roughest terrains. All of our Biothane ® tracking lines are 33-ft in length, although custom lengths are available. Choose from brown or black, 3/8-inch round, 1/2-inch or 3/4-inch flat width and either heavy or medium weight. Tensile strength 1000 lb. We use only solid stainless steel snaps for strength and reliability.