What was the first hat added to TF2?

What was the first hat added to TF2? The nine hats introduced were the Batter’s Helmet, for Scout, the Soldier’s Stash, for Soldier, the Pyro’s Beanie, for Pyro, the Demoman’s Fro, for Demoman, the Football Helmet, for Heavy, the Mining Light, for Engineer, the Prussian Pickelhaube, for Medic, the Trophy Belt, for Sniper and the Fancy Fedora, for Spy.

The nine hats introduced were the Batter’s Helmet, for Scout, the Soldier’s Stash, for Soldier, the Pyro’s Beanie, for Pyro, the Demoman’s Fro, for Demoman, the Football Helmet, for Heavy, the Mining Light, for Engineer, the Prussian Pickelhaube, for Medic, the Trophy Belt, for Sniper and the Fancy Fedora, for Spy.
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