Riemann is a Danish manufacturer of specialised skin care products. It was founded by Claus Riemann who had the vision of creating products with an "objectively identifiable effect" or put more simply - products that work! He launched P20 sun screen in 1979. It was the very first high factor sunscreen and offered the extra benefit of only needed on application a day. Today P20 is the 4th largest sun protection brand on the market.