User blog comment:Witchking99/Catus Lepus, The Tricky War Hare/@comment-26815373-20160410200238/@comment-7709681-20160411003434

The champions are invisible while inside the hat, and the hat remains until the duration ends or is destroyed. And being hit while invisible is still a feature of stealth.

But now that I notice: You say that the hat can be destroyed, if so where's its health?