Drow Piwafwi Cloak is an item that can be had in chapter 5 of Baldur's Gate II: Shadows of Amn and also Baldur's Gate II: Enhanced Edition.
Another cloak is available from an encounter within Watcher's Keep Final Seal as a looted item from defeating Ameralis Zauviir.
Description[]
| “ | The cloak can be made in every possible shape with just about every type of fabric. The most common forms are a circular piece of fabric with a hole in the center for the head, and fabric draped from neck, connected by a chain, brooch, cord, or pins. Talented drow weavers have woven strands of adamantine into the cloak, thus rendering it useless if exposed to the light -- the effect of which will turn the cloak to dust. | ” |
Gameplay[]
While pursuing Inside the Drow City questline obtained in Ust Natha the party will probably need to obtain a Drow Piwafwi Cloak for Phaere.
A second cloak can be looted from a battle in Watcher's Keep.
The Piwafwi Cloak is infused with the adamantine element used by the drow. The cloak will turn into a Adamantine Dust when exposed to the surface world's light.
However, when worn underground or in the Underdark, this cloak offers the wearer a -6 bonus vs. Breath attack saving throws and +75% bonus for Hide in Shadows and Move Silently skills.