It is the body’s largest organ, regulates blood heat, protects against injury, and prevents infection. The skin contains nerves that sense cold, heat, pain, pressure, and touch. it’s created from, a skinny outer layer (epidermis), a thicker middle layer (dermis), and also the hypodermic tissue.
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SPF stands for Sun Protection Factor and refers to the theoretical amount of time you can stay in the sun without getting sunburned. For example, an SPF 15 would allow you to stay in the sun 15 times longer than you could without protection.
UV radiation is part of the electromagnetic (light) spectrum that reaches the earth from the sun. It has wavelengths shorter than visible light, making it invisible to the naked eye. These wavelengths are classified as UVA, UVB, or UVC, with UVA the longest of the three at 320-400 nanometers. UVB ranges from 290 to 320 nanometers. With even shorter rays, most UVC is absorbed by the ozone layer and does not reach the earth.
Natural sunscreens reflect the sun’s rays like a mirror to protect exposed skin. Chemical sunscreens absorb the sun’s rays in a chemical reaction that dissipates the heat back off the skin.
This depends on your body size and the exposed area of your body but approximately 1 ounce (enough to fill a shot glass) is recommended.
Our sunscreens protect by reflecting the sun’s UVA and UVB rays with better results than chemical sunscreens with higher SPF numbers.