The costume is called the invisible kid, and it's basically a full black body suit that even covers the child's face. Multiple companies make it.

The packaging warns about impaired vision, but also brags that it will make your child disappear into the pitch black night.

“It’s a terrible idea,” said safety expert Kate Carr. “Kids won’t be seen, especially if they’re darting out into the street on Halloween night.”

Safety experts say one solution, no matter what your kids wear, is to put glow-in-the-dark bracelets and necklaces on every trick-or-treater.