The Light Woven Shirt is a mystic armor in Final Fantasy XII that boosts the wearer's Defense by 5 and Magick Power by 2, and in the Zodiac versions, MP by 7. It is the second weakest mystic armor in the game.
The Light Woven Shirt is sold for 200 gil in Rabanastre after obtaining the Sunstone, and in the Barheim Passage. It is found as a treasure in Barheim Passage's Op Sector 37 (77% chance to appear, 30% chance for gil, 50% chance the item treasure is the Light Woven Shirt without the Diamond Armlet equipped ), and rarely drops from the Ichthon in Garamsythe Waterway and Dalmasca Estersand.
The Light Woven Shirt is sold for 200 gil in Rabanastre, Giza Plains - The Dry, Nalbina Fortress, and the Barheim Passage. It is found as a treasure in Garamsythe Waterway's flooded No. 11 Channel (75% chance to appear, 40% chance for gil, 50% chance the item treasure is the Light Woven Shirt without the Diamond Armlet equipped), and still rarely drops from the Ichthon in Garamsythe and Estersand.
The Light Woven Shirt is the second weakest mystic armor, giving 5 Defense and 2 Magick Power, as well as 7 MP in the Zodiac versions. Mystic armor offer magick-related bonuses that affect all types of magickal actions, from casting black magick to damage an enemy, to casting white magick to heal the party. Magick Power is also a factor when determining damage dealt by katana, staves, and maces.
In the Zodiac versions, White Mage, Red Battlemage, Black Mage, and Bushi can equip it, and Penelo starts with the license for it so she can wear it no matter the job. If the player starts Vaan in any of the aforementioned jobs, the player can start him off with the Light Woven Shirt from the shops. In the original version, Vaan can wear any equipment piece and the HP-boosting light armor and Strength-boosting heavy armor are likely better suited in this early point than mystic armor.
It is worth buying over trying to get the rare drop from Ichthon, for its low drop chance from a not-too-common enemy, and its low purchase price. There also isn't a better mystic gear easily available in the early point, unless from the Trial Mode in The Zodiac Age versions, where the spoils can be brought back to the main game. In The Zodiac Age, the player could get the superior Silken Shirt from Trial Mode Stage 5 Diamond Armlet treasure.