People with acne or oily skin may prefer a powder because it feels weightless and has a matte finish. However, you can also use a liquid foundation that is oil-free and non-comedogenic like Dermablend's Flawless Creator Liquid Foundation Drops without worrying about clogging your pores. Non-comedogenic means the formula will not clog pores and create blackheads (open comedones) or milia (closed comedones). If you use a liquid foundation, you can use a setting powder on top of it to mattify the finish and help control excess oil.