the hat with the Velcro lining

Disguise-craft applied to an object. The bright-white Mr. Howell yachting cap reads as pure affectation — jaunty, a costume note — and that is exactly its operational value: a hat too conspicuous to search is a good place to hide contraband. The detachable, Velcroed lining turns headgear into a smuggling compartment, and the scene closes on Pemulis "carefully de-Velcroing the lining" as he takes Hal's call. Concealment that hides by being flagrantly, distractingly visible — the same hiding-in-plain-sight principle the veil and the wig run on, scaled down to a party hat.