Board Thread:Skyrim/@comment-121.54.83.66-20130413145911/@comment-86.146.108.166-20140823142638

I think it's purposeful, if you look at the cultist armor the boots are clothing/no armor rating. Therefore Mirraak's boots should also act as clothing but they decided to put some amor on them like the Diadam's Savent (sorry if spelt wrong :) )