Solar Rx is designed to offer the maximum physical protection from UVA & SPF 30 for UVB burning rays without using a chemical sunscreen. We recommend reapplying at least every two hours* on the face neck and hands. Intense sun conditions require even more frequent application. UV index ratings of 8 and above for average skin can require application as much as every 15 minutes as tested using a UV meter. This is not a product for sun bathing, extreme hot weather sports or swimming. Keys Solar Rx is featured on the Environmental Working Group Skin Deep Report as one of the safest sunscreen on the market. Key Solar Rx is featured as the most effective non-waterproof category sunblock for UVA and UVB in the Consumer Reports July issue. It is rare to find a product that is both safe to use and effective. Keys Solar Rx carries a UVB (UV Burning) rating of < SPF 30 and a UVA (UV Aging) of four stars using the EU rating system. High SPF rated chemical sunscreens will prevent burning, but often do little to provide UVA protection. Solar Rx combines the healing soothing properties of Keys Luminous moisturizer and adds a 16% concentration of uncoated nano-zinc oxide to provide a physical UVA & UVB blocking to protect against UV triggered Melanoma and Skin Cancer. Their nano-zinc oxide (ZnO) is uncoated to provide healing therapies associated with zinc oxide. The uncoated zinc has also proven to be anti-bacterial and antimicrobial and can reduce redness, rosacea, age spots and melasma. Solar Rx carries a EWG Skin Deep Rating of 0 (0 to 10 scale where 0 is best). NOTE: Due to the high demand of Solar Rx, we are now projecting order shipments will be scheduled for the week of July 14. This is being driven by the EWGs sunscreen report and the widespread concern it has generated in the United States. We apologize for any delay and appreciate your patience. This is a delay from the manufacturer and will be the same for all companies who sell this product.   Visit Seller.