Skeletal armour is Fremennik armour for mages that can only be made by going to Waterbirth Island. The armour is a lower-level Power set, requiring 50 Defence, and most of the set can only be worn after completion of The Fremennik Trials. When the full set of skeletal armour is worn (boots and gloves not needed), the title "Skullbearer" is added to the player's Fremennik name.
Skeletal armour may be placed in a magic wardrobe within the Costume room of a player-owned house, so that the armour set does not take up bank space. This armour should not be confused with the Skeleton set holiday items given out for the 2006 Hallowe'en event. The holiday skeleton set gives no bonuses in any stat.