Sun cream protects your skin from the harmful effects of both types of ultraviolet (UV) sun rays, ultraviolet A (UVA) and ultraviolet B (UVB) rays. UVA is known to cause premature ageing of the skin, including things from causing wrinkles to age spots, on the other hand, UVB rays can burn your skin, causing skin cell damage. Using sun cream consistently can help prevent either of these harmful rays from coming into contact and penetrating your skin, leaving your skin healthy and vibrant.