I do not know if the announced protection will be guaranteed but an index 50 that is often repeated during the day of exposure normally it should go (I live in Normandy and at the moment the sun is so generous and cool weather that kept very discoveries are not yet out!). By cons, what I like is the ease of application, the product forms a thin white layer on the skin that spreads easily. Then there is a sensation of dry skin, not sticky and the smell is really nice. I'll take this for another holiday, we all have very fair skin, it will be great for my family.