What is a significant design feature of modern personal escape rope systems?

The significant design feature of modern personal escape rope systems is the construction with heat-resistant sheathing. This aspect is crucial because during a fire emergency, the environment can become extremely hot, potentially damaging the rope material and compromising its strength and integrity. Heat-resistant sheathing helps ensure that the rope remains functional and safe to use even in high-temperature situations, which is essential for the safely executing an escape.

While there are other features that may be beneficial, such as the inclusion of reflective materials to enhance visibility or the ability for the rope to have multiple uses, the primary focus of personal escape systems is to ensure reliability and safety in extreme conditions. The specialized materials used in the construction of these ropes make them suitable for rapid deployments in hazardous environments, directly impacting their effectiveness during emergencies.