Go lightweight when it comes to your formula.
With combination skin, you don't need to turn to your foundation for hydration since you likely already have a good balance of oil on your face. And unless you have hyperpigmentation or blemishes to conceal, opt for a more sheer, lightweight foundation to even out your complexion. Use a tinted moisturizer or a CC cream, like CoverGirl Queen Collection CC Cream, especially during the hot summer months, to give your skin a chance to breathe.