Serpent Scale Armor

From Candlekeep Mysteries, page 98.

Description
Armor (scale mail), uncommon

This suit of magic armor is made from shimmering scales. While wearing it, you can apply your full Dexterity modifier (instead of a maximum of +2) when determining your Armor Class. In addition, this armor does not impose disadvantage on your Dexterity (Stealth) checks.