Armor Proficiency, Medium (Combat)
You are skilled at wearing medium armor.
Prerequisites: Light Armor Proficiency
Benefit: When you wear a type of armor with which you are proficient, the armor check penalty for that armor applies only to Dexterity- and Strength-based skill checks.
Normal: SA character who is wearing armor with which he is not proficient applies its armor check penalty to attack rolls and to all skill checks that involve moving.
Endzeitgeist Says: Slightly more feasible for some characters, though I'd still suggest first taking a look at your multiclassing options. If you find yourself needing this without having access to it anyways, make sure that your class abilities still work in medium armor!