Seafarer's Armor

You have a +1 bonus to AC, can breathe
normally underwater while wearing this armor,
and gain a swimming speed of 30 feet. Additionally, whenever you start your turn underwater with 0 hit points, the armor causes
you to rise 60 feet toward the surface.
This magic armor is made of countless hardened
scales lining a reinforced leather jacket, making it
a sturdy and weather-proof option for sailors.