Used only once!
The shoes were a bit too small/narrow for me, otherwise they felt very good. Therefore, I recommend the shoes for someone with shoe size 42.
Here is the shop description:

Trailrunning shoes for long runs
The Ultra 100 trailrunning shoes from Dynafit provide high stability and good grip. They feature a moderately profiled rubber sole that offers excellent traction on loose gravel, wet meadows, and muddy trails. These shoes combine optimal cushioning and effective traction with excellent energy return. Their comfortable fit makes them perfect for long-distance runs on any terrain.

Runners are also supported by the Ultra midsole and the cushioning footbed. The heel and toe areas are reinforced, ensuring good stability and robustness on rough terrain. Above the thinly padded tongue, the flat lacing provides optimal adjustment options. The lacing system is covered to prevent the laces from snagging or coming undone while running on trails. The drop of the lightweight Ultra 100 from Dynafit is 6 mm, offering a good balance of comfort and precision in trailrunning.

Key points at a glance:

- Best suited for long distances
- Vibram Megagrip outsole ensures optimal grip
- Cushioning properties provide better running comfort