SAFE.EASY.FAST. SAFE: In case of panic, simply pull the yellow QR plugs when caught under the sail or in any emergency situation. The QR lines will immediately release from the harness straps, freeing the harness hook for a fast and safe exit.EASY: Different QR line lengths are available, allowing you to adjust the length based on who will use them in the family. If conditions change or if the same boom is used for different sail sizes, easily adjust the QR lines' length without the need for standard Vario-lines that wear out over time.FAST: Not only can the harness straps be placed on the boom without removing the back end, but attaching the QR lines to the QR straps also takes just a few seconds.