Xyxlbark is a light, flexible bark/metal. If the armor normally imposes disadvantage on Dexterity (Stealth) checks or has a Strength requirement, the mithral version of the armor doesn't.

Regain 2 hit points at the start of each turn. 

Regain 2 hit points when you reach 0 hit points once per long rest. 

Plate consists of shaped, interlocking metal plates to cover the entire body. A suit of plate includes gauntlets, heavy leather boots, a visored helmet, and thick layers of padding underneath the armor. Buckles and straps distribute the weight over the body.

Notes: Stealth Disadvantage: Remove, Bonus: Armor Class, Combat, Warding, Str. 15 Required, Stealth Disadvantage