The lightest Petzl harness! FLY is a minimalist harness specifically designed for technical mountaineering and ski mountaineering. Allowing you to don the harness without removing your skis or crampons, it's a practical solution. It's also modular, with removable waistbelt and leg loop padding, so you can adapt the level of comfort and weight. Multiple gear loops and ice screw retainers allow you to keep your gear within reach.