Quechua, but to be fair they're not fully rigid but enough for crampons so all purpose rather than technical mountaineering. Have had them up to 5,200 metres though
Edit: got height wrong and sounded like I was exaggerating to sound cool
I really wish I had some hybrids like that. 10mi approaches are no fun with rigid boots on. Have been eyeing up a pair of lightweight La Sportivas half crampon boots recently.
And then I remember it's unlikely I'll be back in the Alps while there's a pandemic on so whatever.
Quechua, but to be fair they're not fully rigid but enough for crampons so all purpose rather than technical mountaineering. Have had them up to 5,200 metres though
Edit: got height wrong and sounded like I was exaggerating to sound cool