Premature aging of the skin is most often the product of years of unprotected sun exposure combined with your genetic makeup. The process of aging causes the skin to thin, become less elastic and more fragile. Your body also produces less natural protective oils, which makes the skin drier. In addition, the fat located in the deeper layers of the skin, that gives your skin a plump appearance, starts to diminish over time. The combination of these factors causes loose, saggy and wrinkly skin. Keeping your skin adequately moisturized will lessen the appearance of wrinkles. Furthermore, regimented use of a sunscreen will help to minimize any further sun damage. A simple way to achieve comprehensive coverage is to find a minimum SPF15 moisturizer that provides broad spectrum protection against both UVA and UVB rays. Most sunscreens do a good job blocking UVB light, but fewer sunscreens filter out UVA radiation. UVB rays are responsible for causing sunburn, but UVA rays have the ability to penetrate into deeper layers of the skin and cause premature aging and skin cancer. A product providing broad spectrum coverage will offer a more complete range of UV protection.