I was worried about the weight too.THIS is exactly why I haven't moved to any of the Audeze models as they are just too heavy and have been stuck on my Beyerdynamic DT 1770Pro (413 g) as its weight and clamping force perfectly matches my head shape for hours of use (I typically get into a zone and will spend at least 4 hours straight editing) but I am tempted to switch over to DCA Aeon2 Noire also well rate by @amirm and its only 328 g.
Turns out, for me, it wasn't really an issue. I can wear the XC for several hours without discomfort.