Shadowsilk

Unit value: Determined by the creature's CR. Armour: A non-magical armour made with shadowsilk grants you advantage on Dexterity (Stealth) checks to hide in lightly obscured areas (such as tree shadows). Harvested shadowsilk from a CR 13 or higher creature can be used to craft a Cloak of Arachnida.

This black semi-transparent silk is carefully made by underground spiders and spider-like creatures.

Type