Angry Birds 2/Hats

The Hats are optional cosmetics in Angry Birds 2 that give an additional multiplier to the player's main birds. Said hats are divided in different sets, and can be purchased with Black Pearls. Collecting all the hats from the same set will upgrade the slingshot's appearance and rank, and will give the player more Bird Power (+1 to every bird in the flock). The Hat Shop also has a Black Pearl treasure chest, which can be opened every twenty four hours.

Hat Upgrades
The Hat Upgrade System was implemented into the game in early 2021 and during hat events, players can get special purple/blue tinted coins that can be used to purchase hat upgrades, rainbow feathers, tower of fortune tickets and free birds tokens. These special coins are gathered through the daily chests and the Daily Challenge, but are converted to rainbow feathers when the event ends (1 coin = 1 rainbow upgrade feather). At the moment, when a hat upgrade event ends, the hat sets in the "Exotic" tier cannot be upgraded with Black Pearls.