Mantle of Spell Resistance

Mantle of Spell Resistance, or its variation Armor of Spell Resistance, gives its wearer advantage on saving throws against spells.

History
Keyleth inherited her leather Armor of Spell Resistance from her mother Vilya, which additionally gives her +2 to her AC.

Trent Ikithon wore a Mantle of Spell Resistance for his visit to the Blooming Grove. After he was defeated, the Mighty Nein took the mantle from Trent, where it was ultimately worn by Kingsley Tealeaf.