They're hydrating/refreshing toners or sprays. You use them after an acid toner but before eye creams, serums, or moisturizers. They can also be used throughout the day when needed to give skin an extra boost.
I've been using the Caudalie beauty elixir and the FAB Vitamin hydrating mist
Is it expensive?
Ive been wondering about this as well.. how much does it actually help you? I think my little sister uses one by Wen? I didn't like it when she sprayed it on me though.
I switch between using Evian and organic rose water (although, I don't use either on a daily basis) I have combo/oily skin. I tried Clinique surge but it was too oily for my skin and didn't seem to penetrate.