Mythril Vest

Mythril Vests are type of light armor made of mythril. It first appears in Final Fantasy Tactics.

Final Fantasy IX
In Final Fantasy IX, a Mythril Vest increases its user's defense by 12, reduces Water damage by half, and can teach the Auto-Potion ability. A Mythril Vest can be bought for 1,190 gil and sold for 590 gil. It can be equipped on any character except Steiner and Freya.