Use a broad-spectrum sunscreen that protects against UVA and UVB rays and has a sun protection factor of 15 or greater. Apply sunscreen year round. The sun can cause damage in the winter and autumn as well as spring and summer. Reapply sunscreen every two hours when outdoors, especially if you're sweating. Wear protective, tightly woven clothing.
Dark colors give more protection.
Long sleeves and long pants add extra protection. The UV Index, developed by the National Weather Service and the Environmental Protection Agency, provides a forecast of the expected risk of overexposure to the sun and indicates the degree of caution you should take when working, playing or exercising outdoors. The UV Index is calculated on a next day basis for dozens of cities across the country by the National Weather Service. If you have access to this index, you may want to regularly check the index. Skin cancer is not caused by just a single burn or tan, rather it is the accumulation of skin damage over many years of sun exposure.