Thermo Shield is the basic treatment that we apply to all our ropes to ensure they have the renowned EDELRID suppleness. The treatment involves a thermal process that perfectly aligns the core and sheath yarns. A special heat treatment relaxes then shrinks the rope’s fibers. This harmonizes the gliding characteristics of the yarns inside the rope, making it supple and compact. The result is the creation of ropes that will neither shrink retrospectively nor quickly become stiff.