At All Good, we offer broad-spectrum reef friendly sunscreen products for all people and all lifestyles. All Good SPF 50+ Sunscreen Butter is perfect for extreme weather conditions and long days in the water. This product contains 25% non-nano particle zinc oxide, our highest SPF formula, so a little goes a long way! Non-nano zinc oxide is a mineral that works as a physical barrier between your skin and the sun. The remaining ingredients include farm-grown calendula, coconut oil for moisture, beeswax and jojoba oil so its great for sensitive skin. All of All Goods sunscreens meet stringent Reef Friendly criteria. This means that our sunscreens only use non-nano zinc oxide as the active sunscreen ingredient, we avoid all chemical UV absorbers, parabens, and harmful additives and we submit our products to 3rd party testing to verify zinc particle size. To apply, gently add a small amount of product to your face, neck, and ears either directly from the stick or by using your fingertips. You can rub it in clear, or leave a layer for additional protection. The sunscreen butters coconut oil base will harden in colder temperatures; so warm the butter stick on the back of your hand before applying. Be sure to reapply sunscreen every two hours or, if you are in water, every 80 minutes. Thanks for choosing Reef Friendly. And remember - All Good Makes everything better!