The Munter hitch is perfectly suited for ski mountaineering as it is simple, only requires a locking carabiner, can be fed quickly (for belayed skiing) and is reversible for belaying or rappelling. Also, unlike many belay devices, it works well with smaller diameter ropes. The downside of it is that it requires constant brake-hand pressure, so if you let go, you can easily drop yourself or the person you are belaying. It also kinks ropes, but for the occasional ski mountaineering belay/rappel, that’s a small price to pay.
