phrygian cap
The Phrygian cap is a soft conical cap, associated in antiquity with several peoples in Eastern Europe and Anatolia, including Phrygia, Dacia and the Balkans. In early modern Europe it came to signify freedom and the pursuit of liberty through a confusion with the pileus, the felt cap of manumitted (emancipated) slaves of ancient Rome. Accordingly, the Phrygian cap is sometimes called a liberty cap; in artistic representations it signifies freedom and the pursuit of liberty.
Basically, the hat that Link and the smurfs wear.
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This tag implicates hat (learn more).