Base armour rating: 1 | Avatar's Aegis: It grants the wearer a chance to resist fire, cold, poison, electricity, acid, and negative energy.
Henzell says...
The +4 cloak Tiamat was given after mean people took away her {gda}. When worn, every hit has 50% chance to be affected as if you had 1 more pip in relevant resistances. Resistances affected: rF, rC, rElec, rPois, rCorr, rN.