Other than your robes, you can loot what is termed "special" armour.
These items loot like normal looted clothing but have armour values and and 1 or more stats if you luck and can be worn by jedi.
These usually come in a variety of levels, the higher the level the better the protection and higher the stat. They usually come in a range of strange names genrally using the word refective in there somewhere.
The also tend to come in the most unblananced, garish, ugly, unmatching, unflattering items in the most discusting colours, shades and trims.
but some times you can get luck and may an outfit out of them.
Althou i have never see any of these clothes that would make an out fit tougher than the Knight or Master cloak