Magic and psionic 
armor protects the wearer better than 
armor without any enhancement. Magic and psionic 
armor provide enhancement bonuses that stack with the equipment bonuses provided by the 
armor. Further, all 
armor penalties for magic and psionic 
armor are reduced by 1.
 
In addition to an enhancement bonus, 
armor may have special qualities. 
Armor with special qualities must have at least a +1 enhancement bonus.
 
Magic and psionic 
armor resizes itself to fit the wearer.
 
Magic or psionic 
armor confers its enhancement bonus to 
Defense for as long as it's worn. If 
armor has a special quality that the wearer needs to activate, then the wearer needs to utter a 
command word (an 
attack action).
 
Purchase DC: To calculate the 
purchase DC for 
armor with an enhancement bonus but no special qualities, use the following table.
 
| 
Enhancement Bonus
 | 
Purchase DC Modifier
 | 
| 
+1
 | 
+8
 | 
| 
+2
 | 
+13
 | 
| 
+3
 | 
+18
 | 
Armor with special qualities has an additional 
purchase DC modifier, as noted under each item entry.
 
Examples of 
armor with special qualities include the following.