Papaya and strawberries contain alpha hydroxy acids (AHAs) which gently exfoliate the old outer skin cells to reveal smooth and glowing skin underneath. AHAs are known for their anti-aging properties and ability to minimize and correct discolouration because they promote skin cell turnover. 
To use:  Rub frozen mask over your face until you have a nice layer (it will thaw as you are running it over your warm skin).  Leave on for at least 15 minutes, or longer (sometimes we forget we have it on and leave it on for much longer).  Rinse with warm water and finish with a nice skin oil or organic moisturizer.  Remaining mask can be returned to your freezer for more uses.