Andy C.wrote a review of Sterling Fusion Nano IX DryXP Climbing Rope - 9mm on September 3, 2019
Familiarity: I've put it through the wringer
Love this rope! The 70M is 1.2 pounds lighter than the Sterling Aero (9.2mm) or Fusion Ion (9.4mm) according to my scale at home. Those pounds make a big difference on long, multi-hour alpine approaches. The thin diameter significantly reduces rope drag too. I originally only used this sparingly for multipitch climbs, but when a large, loose block fell on my rope and severed the sheath, I used the remaining 30M for gym climbing and whipped on this bad boy weekly for over 8 months before finally retiring it. It's more durable than you think!! Now I've got a fresh 70M bi-color and a fresh 60M bi-color ready for future adventures!