In case you didn't know, the traditional uniform worn by students of the martial arts is called a
gi.
Several Gis I've designed, only wearable by: Kensai, Monk, Thief, Mage/Sorcerer (maybe the Shapeshifter as well, or is that kit a lost cause?)
Gi of Theft: +10% to Detect Traps, cast Knock 3x per day (loot from Anishai, the Monk in Mae'Var's Guildhouse). I may come up with a better name for this.
Gi of Meditation: +1 to WIS, wearer is immune to Charm, Confusion, Chaos, and Feeblemind (the classes that can wear gis cannot wear a Helm of Charm Protection)
Gi of Freedom: Grants Free Action while worn, wearer is immune to Sleep
Tai Kaje's Gi: +1 to all Saving Throws, wearer is immune to Fear and Level Drain (It's not right that Monks can only use the Amulet of Power against Vamps, as they shouldn't be allowed to wear it)
Wong Fei's Gi: +2 bonus to AC, +10% bonus to hitpoints, +5% Magic Resistance
Various other Gis granting elemental/physical resistances, similar to the current battery of Mage Robes
I've got loads more items if you want 'em, man!