


Climbing device -
The
This innovative system only activates when necessary, ensuring smooth handling while enabling dynamic belaying. It facilitates the descent of heavier climbers thanks to precise control and ease of release once activated. Boost mode allows for quick activation when attached to the first anchor point with a screwgate carabiner, reducing the risk of falls to the deck even if only the first Quickdraw is in place.
Compatible with single ropes from 8.7 to 11 mm, this ascender is an ideal choice for climbers seeking a belay device that is safe, effective and ergonomic.


- Activates only when necessary for smooth handling
- Dynamic belaying is always possible
- Enables easier and more controlled descent for heavier climbers
- Easy to unlock once activated
- Attaches to the first Quickdraw
- Boost mode: attach the Mammut Assist Belay Resistor belay device to the first anchor point using a screwgate carabiner, to enable quick activation when there are significant weight differences.
- Activates even when only the first Quickdraw is in place, reducing the risk of falls on the deck
- For single ropes: 8.7-11.0mm