San Francisco weather requires a master's degree in advanced layering. The weather can, and will, turn on a dime. One of my favorite tricks is to layer with a vest - yes, even under a leather jacket! The added warmth is perfect for when it's bright and crisp, but if the sun decides to do her work it's easy to slip it off, or slip the jacket off, or slip both off, or some other variation. Paired with distressed skinnies, espadrilles and a big straw hat you are ready for whatever adventures come your way.