Keolandish Plate Mail of the Seas

This magic armor was originally created as a gift of the King of Keoland to an admiral who had fought successfully against the Sea Princes. While you wear this magic armor, you gain a +1 bonus to your AC and you have a Swim Speed 30 feet.

The wearer has disadvantage on Stealth (Dexterity) checks.

If the wearer has a Strength score lower than 15, their speed is reduced by 10 feet.

Proficiency: heavy armor Source: Treasures from Oerth p. 19 (Homebrew)