Level
1st
Casting Time
1 Action
Range/Area
Touch
Components
V, S, M *
Duration
8 Hours
School
Abjuration
Attack/Save
None
Damage/Effect
Buff (...)
You touch a willing creature who isn’t wearing armor. Until the spell ends, the target’s base AC becomes 13 plus its Dexterity modifier. The spell ends early if the target dons armor.
* - (a piece of cured leather)
Using a shield adds to your AC because the spell says "the target’s base AC". In the rules glossary, your base AC is equal to 10 + your Dexterity modifier, and a shield just adds a bonus to your AC if your proficient with it.