Aubrey Organics Natural Sun Active Lifestyles Tropical Scent Medium Protection Sunscreen SPF 15 - 4 oz. (118 ml)

Aubrey Organics Natural Sun Active Lifestyles Tropical Scent Medium Protection Sunscreen is the same great formula in a lower SPF for outdoor enthusiasts who need a little less protection. Aubrey Organics Natural Sun Active Lifestyles Tropical Scent Medium Protection Sunscreen is made with moisture-rich macadamia and kukui nut oils to keep skin hydrated. Aubrey Organics Natural Sun Active Lifestyles Tropical Scent Medium Protection Sunscreen contains fragrant botanical oils for an irresistible tropical scent. Aubrey Organics Natural Sun Active Lifestyles Tropical Scent Medium Protection Sunscreen provides SPF 15 protection from UVB and UVA rays. Aubrey Organics Natural Sun Unscented High Protection Sunscreen helps prevent sunburn.

• UVC rays are the shortest, so short that they usually don't make it through the Earth's ozone layer to reach your skin. When it comes to sun protection, UVC rays are not a concern.
• UVB rays are a little longer, and can penetrate the skin, but not too deeply, reaching only the outer layers (epidermis). UVB rays are responsible for causing your skin to tan and/or burn. Longterm exposure to UVB rays can rapidly age your skin, making it look leathery and wrinkled.
• UVA rays are the longest UV rays, and can penetrate more deeply, into the dermis, the second layer of your skin. They can do serious damage at the cellular level, causing cellular changes that can lead to skin cancers. They are a primary cause for photo aging, wrinkles and skin discoloration.

"Critical wavelength" is the international rating system for UVA protection, defined as the point at which a sunscreen allows 10% of UVA rays to penetrate the skin. The FDA has determined sunscreens with a critical wavelength of over 370 nanometers provide excellent protection. Aubrey's Natural Sun SPF 30+ sunscreens have a critical wavelength of 375 nm.

How do Aubrey Organics' sun protection products work?
There are two main types of sunscreens. Chemical sunscreens work by absorbing UV rays before they have a chance to penetrate and damage the skin. (These types of sunscreens are more controversial because they are easily absorbed by the skin and can cause allergic reactions, irritation and other more serious concerns.) Physical barrier sunscreens form a protective layer on top of your skin that blocks and reflects the sun's harmful rays.

Aubrey's Natural Sun sunscreens are physical barrier sunscreens, formulated with micronized titanium dioxide and zinc oxide as the active ingredients. Titanium dioxide and zinc oxide are naturally occurring minerals, and are among the 17 ingredients approved for sun protection by the FDA. Since both are white in color, the larger the particles of these ingredients, the more of a whitish film they leave on your skin. "Micronized" simply means they are ground into a very thin powder made up of particles so small, they are measured in either microns or nanometers (nm). The smaller the particles, the less visible the ingredients.

Aubrey Organics is very confident in the track record of safety and effectiveness of these ingredients, which is backed by many clinical studies.

What are nanoparticles? Should I be concerned?
A nanoparticle is a very tiny piece of a solid substance. "Nano" means "billion," and a nanoparticle is defined as a particle smaller than one billionth of a meter (a nanometer, or nm). Nanoparticles of zinc oxide and titanium dioxide are often used in sun products to minimize the white film these ingredients can leave on the skin.

Some consumer groups have raised concerns about nanoparticles, fearing that something so small could penetrate the skin, get into deeper tissues, and have adverse health effects. This issue has been studied extensively over the past five years. The overwhelming number of current studies indicates that nanoparticulate titanium dioxide and zinc oxide do not get past the epidermis. The FDA has determined nanoparticles are safe when used in cosmetics and sunscreens.

That said, Aubrey Organics' testing has shown that the average particle of micronized titanium dioxide in Aubrey sunscreens has an average size of 202 nm, or twice the largest size considered a nanoparticle, while the average zinc oxide particle is more than 1,000 nm, or ten times the size of a nanoparticle.