The Mammut Adam Ondra Sender Light Harness is built for climbers who want the harness to stop registering as gear mid-route. The fixed elastic leg loops and Dyneema belay loop work together to keep the tie-in zone uncluttered and movement unrestricted, so the setup disappears on steep terrain and the focus stays on the sequence. What Our Gearhead(R) Experts Are Saying:"The elastic leg loops are what I notice most. They move with every high step and heel hook without pulling or binding, so nothing interrupts the sequence on a hard move."