I’ve always <i>loved</i> the topography of friction savers / cambium savers:<p><a href="https://m.youtube.com/watch?v=sKEfLm066-4">https://m.youtube.com/watch?v=sKEfLm066-4</a><p>It’s such a clever idea using the emergent properties of gravity, stiction, and geometry.<p>A friction saver is a thick strap with two eyelets in it. With the strap placed over a limb, you can then run a thick rope through the eyelets instead of running the rope over the limb, which would otherwise abrade the rope and tree surface.<p>But how do you get the friction saver up there in the first place? To install, once you have a throw line over a limb you then add the friction saver as a segment to the end of the throw line <i>but with the throw line also threaded into the eyelets of the friction saver</i>. Once the friction saver is over the limb it will stick with a sticktion much stronger than the throw line is stuck to the friction saver.<p>Getting it back down is another clever trick which relies on one of the eyelets being larger than the other. To understand that (er, or indeed the whole system, as this is quite hard to explain) … watch the video.