The Aperture Labs Hard Hat, formerly known as the [ classified ], is a promotional headwear item for all classes. It is a white hard hat with a potato-powered miner's light with a team-colored glow, connected by two insulated orange wires. The side opposite to the potato sports two pieces of grey electrical tape covering an old Aperture Science logo, which can be uncovered via its style.

This hat was awarded to players who had bought the Potato Sack pack, or owned all the games from the pack. It first became available with the April 5, 2011 Patch and could be obtained prior to the release of Portal 2.

It can be worn by Atlas and P-body in Portal 2's co-op mode.