To use this Sun Bum Tinted Face Lotion, simply apply it evenly to your face before sun exposure. Make sure to cover all areas that will be exposed to the sun. Since it's water-resistant for 40 minutes, if you swim or sweat a lot, reapply the lotion after 40 minutes. Keep it in a cool and dry place. If you have extremely sensitive skin, it's a good idea to do a patch test on a small area of your skin first. Also, don't forget to wash your hands after applying the lotion. This way, you can enjoy the protection and the matte finish it provides all day long.