In exchange for all of the foundling characters to Shun Heavy Armor, they are used to being Unfettered on Deck (of a moving ship) all the time. The foundlings was a life of trade, not combat, and with the greater elemental weathered unnatural conditions they learned from and in such conditions they are naturally adept at using what would be unnatural footing to others, to their advantage.
Benefits: When not on a unmoving, flat and stable surface and Unfettered, the character gains +1 AC.