Obagi Sun Shield Matte Broad Spectrum SPF 50 offers broad spectrum protection from both UVA and UVB rays in a sheer, matte finish to reduce shine as well as sun protection factor 50 using chemical and physical ingredients. Zinc Oxide deflects the UV rays, while Homosalate and Ostisalate absorb and release radiation. SPF 50 is recommended for daily use by the Skin Cancer Foundation to protect your skin from daily exposure to UVA and UVB rays. Obagi Sun Shield Matte Broad Spectrum SPF 50 provides broad spectrum, sun factor protection 50 using chemical and physical ingredients. Zinc Oxide deflects the UV rays, while Homosalate and Octisalate absorb and release radiation. Obagi Sun Shield Matte has a matte finish to prevent oiliness and shine, is non-comedogenic (so won't block pores), hypoallergenic, fragrance-free and dermatologist-tested, making it suitable for all skin types. An essential step in your morning skin care regime, it is suitable for use with all Obagi Systems. Did you know? Daily exposure to UVA and UVB without SPF protection damages your skin’s collagen and elastin, causing short term effects such as burns, and long term concerns such as fine lines, wrinkles, and dark spots. Exposure to UV rays contributes to the development of skin cancer.