Each half (the top and bottom) can be worn independently of one another. They provide bonuses to a player's Prayer skill when worn. They consists of a top and bottom half, with both halves providing the same Prayer bonuses.
The druid's robes set is now obtained solely as drops from chaos druids.
With the release of the Troll Warzone update on 31 January, 2012, druid's robes were unintentionally discontinued, as the druids and druidesses in Taverley were made unattackable. Jagex eventually fixed this oversight by making chaos druids drop them instead.