All toners are meant to be used to correct the pH of your skin, so your skin is ready for your other serums and moisturizers.  This lovely spritzer does that, plus rehydrates the skin - in the middle of a work day, after a long day of travelling, or right before your head out on the town.  But, it also has copper in it, which is antimicrobial and can improve collagen synthesis.  A bottle of goodness.