Riemanns p20 spf30 100ml is non greasy and fragrance free to provide the ultimate coverage both in and out of the water for up to 10 hours a day specially designed to ensure that one application a day is sufficient keeping the time spent applying and re applying sun protection to an absolute minimum p20 is proven to work for up to 10 hours1 due to a very stable formulation it is proven to remain effective in the water even after frequent swimming throughout the day p20 retains the same