Steel Wrack Armor

Rare Light Armor (Padded)
Requires attunement

AC. 12 + Dexterity modifier
Cold Absorption. While you are wearing this armor, you gain resistance to Cold damage. Additionally, whenever you take Cold damage you gain 1d6 temporary hit points.
Waterlogged. While you are submerged in water, the armor becomes tougher and you gain a + 1 bonus to your AC. Additionally, you have advantage on Athletics and Acrobatics checks you make if you are wearing this armor while underwater.