It's a hooded bodysuit made of what looks like a loosely woven fabric of incredibly fine silvery wires. The overall effect is very... glittery. Visually distinctive. And the fabric/netting is a little stiff; it would show pretty easily under tight clothing.

"A sufficiently well-calibrated scanner will pick it up anyway, but there's no sense going around advertising it more than I need to," says Mark. "So I want something to wear over it that'll look natural."