In reply to Pj84:
Maybe. Depends.
Climbers in the 80s regularly used similar boots for 7000ers. Climbers in the 80s also often lost toes to frostbite.
It will really depend on the peak, the month, your physiology, your high camp and various things. They're pushing it though.
And there are 7000ers and there are 7000ers:
- Peak Lenin, yes. Peak Pobeda, no.
- Spantik, yes. Gasherbrum IV, no.
- Pumori, yes. Jannu, no.