White pirate shirts can be bought from Dodgy Mike's Second-hand Clothing in Mos Le'Harmless for 300 coins, or looted from Customs evidence files. They offer no bonuses. They can be used as part of the required pirate clothing for Rocking Out. On a female character, the sleeveless shirt has straps for shoulders instead, due to a U-shaped neck, and it also shows the midriff.