Hide Armor

Hide armor are all types of body armor which are made from the skins and furs of animals and monsters, which does include leather armor (which is made from cow skin or something fancy as dragon skin). In some cases, this criteria is quite arbitrary, as there are many armor made from hides, but clearly are mail armor or plate armor version of mail or plate armor. In case you aren't certain it belongs here, look at which classes can wear, the armor class modifiers, strength requirement and see if it matches it of a normal studded leather armor, leather armor or hide armor.