Flutter Armor
The Flutter Armor Pack is a set of equipable armour included with the Ultimate Edition of Echoes of Aincrad. It contains Flutter Robes and Flutter Boots.
Theme
The Flutter set is themed after Rex and Emirun, the original characters introduced in the tie-in film Sword Art Online: Unanswered//butterfly. See Unanswered//butterfly for more on the film and its cast.
Avatar-Aware Appearance
Flutter Robes and Flutter Boots are avatar-aware: their appearance changes depending on the player character's body type. That means the set adapts to whichever look the player chose during character creation rather than locking everyone into a single silhouette.