Mask

Mask, in the context of Guild Wars, usually refers to any of the following:
 * Ranger mask - a type of headgear armor for Rangers
 * Mesmer mask - a type of headgear armor for Mesmers
 * Assassin mask - a type of headgear armor for Assassins
 * Tengu Mask - a type of festival hat from Day of the Tengu
 * Dragon Mask - a type of festival hat from Dragon Festival
 * Margonite Mask - a type of collectable drops from Margonites