魔道士のローブ / 魔導師のローブ [madoushi no robe] or 'mage's robe' in Japanese. Not to be confused with 魔術士のローブ, which is known as Wizard's Robe.
Final Fantasy III

Stats: DEF 13, MDEF 13, INT +1, MND +1, weight 0
Use: FRE, ONK, WHM, BLM, SCH, GEO, EVO, BRD, DEV, MAG, SAG, SMN
Buy: 2,000 gil (sell: ? gil)
Shop: Village of the Ancients, Dwarven Hollows
Treasure: Gulgan Gulch
Type: Body
Other: 魔道士のローブ in Japanese
Revenant Wings
Stats: DEF 15, MDEF 30
Buy: 1,600 gil (sell: ? gil), chapter 4
Treasure: Maleficent Mayhem
Description: Indigo robes adorned with stars
Other: as Mage's Robes
Other: 魔導師のローブ in Japanese
Record Keeper

Mage Robe (III)
Stats: DEF +4, MDEF +6, EVA 93 (lv1), ? (lv3), ? (lv5), DEF +17, MDEF +29, EVA 93 (lv10)
Max Level: lv3 (initial), lv5 (first evolve), lv10 (second evolve)
Type: Robes, Rarity: ★
Category: Equipment