Riemann P20 OAD Sun Filter SPF15 provides 10 hours protection from one just application and is very water resistant even after swimming frequently throughout the day. Its clear, lightweight consistency ensures a silky and even coverage. Active 15 minutes after application, its quickly absorbed, non sticky and leaves no white marks. Riemann P20 OAD Sun Filter SPF15 is a highly effective sun-block which wil pr you with up to 10 hours protection at a time; this lightweight and non-greasy formula is also water resistant which means you can go on with your day without having to worry about restrictions, whilst knowing you are fully protected against harmful UVA and UVB rays at the same time.