First off I have combination/oily skin
The product states (directly from the urban decay website): "In an exclusive partnership with SKINDINÄVIA, we developed this groundbreaking setting spray that keeps your makeup on for 16 unbelievable hours. Legendary enough that it’s already inspired imitations, All Nighter boasts a patent pending Temperature Control Technology that makes this weightless mist so powerful and sets it far above the competition. Your makeup won’t melt when it's warm and humid or become dehydrated when it’s cold and windy. Yes, it actually lowers the temperature of your makeup to hold foundation, eyeshadow, blush and concealer in place. The sprayer, unlike others on the market, delivers a micro-fine mist that distributes product evenly over the skin. "
Don't mistaken this product as another alternative for your Mac Fix + ! I wouldn't recommend spritzing this before you apply your make up though some do. Also you can use this as a mixing medium for your loose pigments and eye shadows.