For multi-day tours I’ve been using the Lundhags Guide BC boot, which is the only leather nordic boot I know of with a removable liner. A bit difficult to source but available in the US via some British and German sites. The lines are great for taking into your bag at night to dry, and pair well with down booties around camp. Not as stiff as the Alpina Alaska, but more comfortable and efficient for low angle stuff, and very well made.