It's important for this preppy look that your hair is in the right mood. If you have straight hair, keep it straight.
[header] How to look preppy and mature [title] Start with your hair. [step] If you have long hair, make your hair messy, but not frizzy. Use curling shampoo while taking a bath, and afterwards when it's dry, curl strands of your hair around your fingers to help it get in the mood.