A lightweight, soft, and skinny rope, the Petzl Volta falls into our alpine and sending rope category. The Volta and the Sterling Fusion Nano IX were duking it out throughout our tests to see which would earn the Top Pick award for this category. Uniquely, both are certified for use as a half, twin, and single rope, and they are the only ropes in our tests to earn this multi-use status. While the Volta is 9.2mm, the Nano is an incredible 9.0mm in diameter and is lighter at 52 g/m to the Volta's 55 g/m. Needless to say, the Nano plays a tough game, and eventually won out for the award. However, the Volta is a widely liked rope by many of our testers.
The Petzl Volta and eight other high-performance ropes are evaluated in The Best Rock Climbing Rope Review.