A Black Silk Robe Statistics:

black silk robe is type 'armor'.  Weight 0.8 stones, level 20.
Armor Class:  20 pierce, 20 bludgeon, 20 slash, 6 other
Effective AC: 18 pierce, 18 bludgeon, 18 slash, 5 other
Armor Type: cloth armor (0% absorb).
Affects mana by 6.
Affects thaumaturgy by 2.
Special Properties: none
Condition:     100%
Durability:  100%
Quality:      91%

Materials Required: 4 black sheets, and a mage robe pattern.