Riemann p20 once a day sun filter spf20 is perfect for people who like swimming in the sunshine p20 once a day sunfilter is simply not like any other product it is a unique product as it needs to be applied only once a day so you can simply get on with enjoying yourself active 15 minutes after application riemann p20 once a day sunfilter provides high sun protection factor 20 and is still 90 effective after swimming it is non greasy non oily and fragrance free to provide the ultimat