Since both UV-A and UV-B are harmful, you need protection from both. For optimum urban life protection we advise a broad-spectrum formula with a minimum SPF of 30, ideally higher.
UV filters fall into two broad categories: chemical and mineral. Most UV filters are chemical. They form a thin, protective film on the surface of the skin and absorb the UV radiation before it penetrates the skin. Mineral filters are insoluble particles that reflect UV away from the skin. While the latter tend to be favoured by dermatologists because they are better tolerated by sensitive skin, the former tend to offer a better cosmetic feel as they are more invisible and lightweight.
Double application of the SPF doubles your protection! We know this … and we are proud of it.