From Guild Wars Wiki
Common armor is a type of armor that uses the same art for all professions. This includes the stand-alone pieces available in Eye of the North as well as any festival headgear.
[edit] Eye of the North armor art
Eye of the North common armor has the same stats as max basic armor and can be upgraded with insignias and runes.
[edit] Headgear
All headgear has the "Item's attribute +1 (Stacking)" bonus. This bonus matches the attribute of any attribute rune applied to the headgear.
[edit] Gauntlets / gloves
- All gauntlets appear as gloves on Mesmers.
- Festival hats used to be headpieces, had no armor rating and could not be equipped with runes or insignias. They were changed to costume headpieces with the 17 December 2009 update.