As pointed out by a reddit.com user over at /r/SquaredCircle/ Kane's current attire is not as obvious at first meets the eye according to a Wikipedia entry:

"After more than four months of inactivity, Kane returned on the December 12 episode of Raw wearing a metallic mask and new ring attire inspired by the incisions of a postmortem human body after an autopsy." ...not barbed wire as most think.