Sterling's IonR is the largest diameter rope in the Fusion range. Its core construction improves all the specs, but the cord retains the handling characteristics that won the original such a loyal following.The IonR remains a lightweight, high-performance entrant. Its unique design is manufactured by first twisting multiple colored fibers into a single sheath-strand and then braiding the sheath to create the speckled pattern. A great diameter for intermediate climbers looking to match a lightweight rope with performance while knowing that the diameter isn't too thin for a beginner belayer.* Main product photo is Red.