Bioré UV Perfect Block Milk protects the skin against harmful UVA and UVB rays. UVA penetrates deep into the skin and speeds up the aging process, while UVB causes sunburn. These rays are also reflective and can cause harm even if you're under an umbrella, fully dressed, or indoor. Daily sunblock use is good practice as it contains Rice Germ Extract that makes skin softer, and Vitamin E to protect and repair skin. It is also comfortable to use as it's non-sticky or greasy unlike other products.