Mage Armor: You touch a willing creature who isn't wearing armor, and a protective magical force surrounds it until the spell ends. The target's base AC becomes 13 + its dexterity modifier. the spell ends if the target dons armor or if you dismiss the spell as an action.<br/><br/>So you LITERALLY do not need to wear armor. Hell, you could be naked and your armor doesn't go below 13 + Dex. You basically have a force field around you, play that up like if something hits you a wave of red light shimmers an inch from your skin only serving to annoy you at the distraction of having all the light cross your vision.<br/>It would really be interesting if you couldn't control when it was active, so you try to bathe and the water doesn't reach your skin, or you try to blend in as normal and the red sparks start flying around you as gravel is thrown from a passing horse then everyone freaks out about a witch in their midst or something along those lines, depending on social acceptance of magic users.