Primers are a great way to set your foudation for a flawless look. Don't be afraid to try different brands, that is the best way to find out which product works best for your skin type. If you are oily skin you will need a matte or oil free finish. For dry skin you will need an added moisturizer. For combo skin...well you get off pretty easy, almost anything works for you.
If you have any questions about primers just let me know.
