Batman Day - Bat Signal T-Shirt

The  is a legendary style item in the chest costume class.

To claim this t-shirt, players must log in between September 13 and September 30, 2018. The shirt can be unlocked by every character on the account.

Obtained from

 * Item Grant

Style unlock
Upon usage the item disappears and unlocks the Batman Day - Bat Signal style chest.

Trivia

 * The T-Shirt was granted to members only on occassion of Batman Day 2019.
 * The item description says that the shirt is not affected by the player's color palette, but it actually at least partly is.