Your companion has resistance to one of the following damage types of your choice while they wear this barding: Acid, Cold, Fire, Force, Lightning, Necrotic, Poison, Psychic, Radiant, Thunder. You can change the type of resistance the barding grants when you and your companion finish a long rest. 

Made from tough but flexible leather, studded leather is reinforced with close-set rivets or spikes.

Notes: Resistance: Acid, Resistance: Cold, Resistance: Fire, Resistance: Force, Resistance: Lightning, Resistance: Necrotic, Resistance: Poison, Resistance: Psychic, Resistance: Radiant, Resistance: Thunder, beast, Combat, Warding