It consists of a Manasilk Robe and Manasilk Leggings as well as two different headpieces: the Manasilk Hood and Manasilk Scarf. Note that only one of the headpieces may be equipped at once but both will trigger a set bonus with the body and legs.
The Manasilk Hood gives 1 defense and increases your maximum amount of minions by 1; the Manasilk Scarf gives 1 defense and increases your maximum amount of sentries by 1 the Manasilk Robe gives 2 defense and increases minion damage by 1; and the Manasilk Leggings gives 1 defense and increases minion damage by 1.
A full set always provides a total of 4 defense and increases minion damage by 2 in addition to any stats given by the particular headpiece. Its set bonus infuses the player's minions with mana as long as they are above 70% of their maximum life. Mana infused minions glow and deal 1 additional flat damage, for a total of a flat damage increase by 3.