This is a great product if you have excessively oily skin or sweat a lot on your face/do alot of sport or working out. It contains rice powder which will absorb oils and prolong the foundation even more. It is translucent and provides a matt finish.
You can apply it over the top of your foundation or mix a little in with your foundation or if you dont want to use foundation but absorb oil you can use it on its own. Just use a large face brush or your kabuki brush and lightly dust all over the face, concentrating mainly on t-zone and chin.