hdt object in inventory

[enkephalin07]

I keep looting these items named "HDT Havok Object", and I find them in my inventory by the dozen. I can equip them, I can upgrade them as armor, and if I'm feeling exploity, I can even enchant them. But if I drop them or sell them, they disappear. I get the feeling that this is a bug; am I even supposed to see these?

[Homilion]

HDT Havok Object is given to NPCs so they use HDT. It is not a bug you are seen them as last I read they were equipped as part of their armor.

[jacques00]

They disappear because they have not been assigned a ground object--so they still exist, they are just invisible and non-interactive, possibly floating in the air as a static object.