The sunlight contains two types of ultraviolet rays that come up with our skin called UVA and UVB rays. UVB rays with skin surface layer epidermes burn and burn, and UVA rays penetrate into deep layers and cause tanning. To prevent these harmful rays, dermatologists prevent sunscreens. Sunscreens create a layer on the skin that best protects against these rays. There are different levels of sunscreen that everyone uses on their skin and needs and prescribed by a specialist physician. Sun-damaging rays can cause fleas, macaques, aging of the skin. For sunscreens, it's a good alternative to cosmetics.