Nordwand 6000 High

These boots are very light.  39 ounces per boot in size 45.5 Euro (about 11.5 US)  That is about 10 ounces lighter than a comparably sized Sportiva Spantik.  

They are comfortable to walk in, and are warm enough to keep my feet cozy in sub-zero (f) temperatures.  

Climbing performance is very good for a warm, double boot.  The dual boa system snugs them down well, so you get minimal heel lift when front-pointing.  

However.  They are incredibly difficult to put on and take off.  They don't open enough to get your foot in the boot.  At home, in a warm basement, sitting on a couch, they take a lot of effort and struggle to get them on your feet.  I've tried putting my foot in the liner first, then inserting liner and foot in the shell.  I've tried putting the liner in the boot first, and putting my foot into the liner while it's in the boot.  It is unbelievably difficult.  There is no way I could get these on my feet if I were in a tent, in the cold. 

Mammut has a video on Youtube of a person putting these boots on. 

https://www.youtube.com/shorts/uqYUfh99dXI

It looks easy in the video.  But if you look closely, you will notice that the person is putting the boots on without the inner liners.  Just sliding his foot into the shell wearing only a sock.  

I really want to like these boots.  However, the process of putting them on and taking them off is so unpleasant and difficult that I will pretty much always use a different pair of boots.  I'd rather climb with my clunkier, heavier Spantiks than struggle with these Mammuts.