Psionic Ward Armour is a set of rare Medium Armour that allows the wearer to have Resistance to Psychic damage.
After all that was done to them at the illithids' caprice, it is little wonder that the gith would construct armaments fit for combating the psionic might
Properties
15
Armour Class + Dexterity modifier (max +2)
Medium Armour 
Required Proficiency: Medium Armour
Rarity: Rare
Weight: 12 kg / 24 lb
Price: 1450 gp
Special
The wearer of this item gains: Psionic Ward: If the item detects that the wearer is gith, they have Resistance to Psychic damage. Whenever the wearer succeeds on a Saving Throw against a spell, they regain 1-4 hit points.
Disadvantage on Stealth checks.
Where to find
Looted from Ch'r'ai Tska'an in Reithwin Town near the bridge leading to the To Baldur's Gate waypoint