The Fusion Ion R, with its 9.4 mm diameter and 57 g/m weight, occupies an interesting place in between size categories. Not quite light enough to save for only your desperate projects, yet not really sturdy enough to handle the grind of full time use. We dragged it up frozen waterfalls, desert towers, and overhanging jugs where it consistently performed well. Our testers particularly loved its supple hand and the soft catches it provides. With just a little more durability it might even have outclassed the Mammut Infinity for our Editors' Choice award. Nevertheless, you can see from the impressive final score it received that we liked it a lot. Shoppers looking for sound overall performance with an emphasis on low weight should consider it an option.
The Best Rock Climbing Rope Review compares the Fusion Ion R and eight of the other most popular climbing ropes side-by-side.