Cloak of Elvenkind

While you wear this cloak with its hood up, its color changes to camouflage you. While camouflaged, you gain _advantage_ on Dexterity (Stealth) checks made to hide and creatures have _disadvantage_ on Wisdom (Perception) checks made to see you. You can use an action to put the hood up or down.

Source: Level Up Advanced 5e · OGL-1.0a · 5.1