These items appear to be wrist or arm guards. They surround the wearer with an invisible but tangible field of force, granting him an armor bonus of +4, just as though he were wearing armor. Both bracers must be worn for the magic to be effective.

Prerequisites: Craft Wondrous Item, mage armor, creator’s caster level must be at least 8.
Cost to Create: 8,000 gp, 640 XP, 16 days.