Star Wars: Knights of the Old Republic/Body

None of the following are usable by Droids and Wookiees.

Clothing

These are simple garments that protect little more than the modesty of the wearer.

The appearance of clothing differs for main player characters depending on class selected at character generation, and for each party member. There are also eight other variants of clothing used by non-player characters: none grant any bonus beyond the aforementioned modesty of the wearer.

World	Area	Source	Cost	Amount
Endar Spire	Command Module	Footlocker	0	1
		Trask	0	1
Taris	Hideout	Carth	0	1
	Undercity	Mission	0	1
	Hideout	Bastila	0	1
	Davik's Estate	Canderous	0	1

Disguises

Disguises are quest items which allow characters to access areas which are otherwise inaccessible. Although descriptions display Max Dexterity Bonus like armor, according to Feedback this restriction does not actually apply. Hence Dexterity modifiers greater than +8 are still added to Defense in their entirety.

Sith Armor

	Defense Bonus: 2 Max Dexterity Bonus: +8
This full body armor could be used to fool people into thinking the wearer was one of the Sith.

World	Area	Source	Cost	Amount
Taris	North Apartments	Sith Commander	0	1
		Sith Backpack

This must be equipped by you or Carth to enter the Lower City. It must be surrendered to Gadon Thek in the Hidden Bek base to enter the Undercity, but while equipped by anyone in upper and lower Taris it can affect dialog with other characters.

Sand People Clothing

	Max Dexterity Bonus: +8
These are the intricate robes of a Sand People warrior. They seem to be in good condition, and might allow a wearer to superficially appear to be a member of the Sand People species.

World	Area	Source	Cost	Amount
Tatooine	Dune Sea	Elite Warrior (5) at level < 12	0	1 (5)
		Sand People Warrior (9)	0	1 (9)
		Elite Warrior (2)	0	1 (2)

This must be equipped by all organic members of your party (which cannot include Zaalbar) to enter the Sand People Enclave: doing so also prevents ambushes in the Dune Sea and Sand People Territory, and other Sand People won't attack unless you try to speak to them.

Using this clothing can affect interactions with Tanis Venn and the mining team in the Dune Sea, but it's normally lost upon first entering the enclave, or removed upon returning to Ebon Hawk or Anchorhead, where it cannot be equipped.

Robes

Jedi Defense is required to use robes, so only Jedi classes can do so.

According to Feedback, the Defense Bonus of robes is included in the feats and effects mod, which is restricted to +10 maximum. For example, a Jedi using a Jedi Master Robe (+3), Master Speed (+4) and Force Armor (+6) only receives a defense bonus of +10, not +13.

Robes	Jedi robes	Jedi Knight robes	Jedi Master robes	Revan robes
Defense Bonus	1	2	3	5

Although descriptions display Max Dexterity Bonus like armor, according to Feedback this restriction does not actually apply. Hence Dexterity modifiers greater than +8 are still added to Defense in their entirety... which is just as well, since most robes except for Qel-Droma Robes and Revan robes grant nothing more than a low Defense Bonus.

Despite this, many Jedi normally still use robes instead of armor because some Force powers are restricted when using the latter.

Armor

Armor Proficiency is required to use armor, which is not usable by Droids and Wookiees. Although all other classes can select these feats, all three proficiencies (Light, Medium and Heavy) are only granted upon character generation to Soldiers like Carth and Canderous, only Light and Medium are granted to Scouts, and only Light is granted to Scoundrels like Mission.

Defense Bonus	Light armor		Medium armor		Heavy armor
Armor	4	5	6	7	8	9
Max Dexterity Bonus	5	4	3	2	1	0
Feats and effects mod	0-4	0-4	0-3	0-6	0-4	0-5
Maximum Total	9-13	9-13	9-12	9-15	9-13	9-14

Although the primary purpose of armor is to grant a Defense Bonus, some also grant bonuses to Damage Resistance (one medium armor even grants Damage Immunity), attributes and Immunity (and some light armors grant bonuses to Stealth).

However, the use of some Force powers is restricted by armor:

Light side powers	Universal powers	Dark side powers
Force Aura, Shield or Armor Force, Knight or Master Valor Stasis Field	Burst of, Knight or Master Speed Force Resistance or Immunity Force Suppression or Breach	Shock, Force Lightning or Storm Drain Life or Death Field Plague

Jedi using any active powers (Stasis Field, Force Suppression or Breach, or any of the dark side powers) should not use armor as it cannot be changed once engaged in combat, which means these powers cannot be used in combat: dark Force users are particularly poorly served by this, since for the vast majority of the game there's no option but to use robes which grant nothing but a Defense Bonus (and a rather low one at that, in the absence of high Dexterity).

The remaining Force powers restricted by armor are buffs granting passive bonuses for varying duration (and Knight or Master Valor can be used by another Jedi not using armor while others do, so light Force users aren't nearly as restricted by it): this means that these powers can be used before equipping armor and engaging in combat.

However, there isn't always time to prepare before being engaged in combat, and continually changing in and out of armor can be tedious... although it seems that buffs active upon entering an area often remain active well beyond their expected expiry, which may be (ab)used to advantage.