This tinted sunscreen shields skin from UVA and UVB rays. But unlike most sunscreens, this sun protection product also defends against infrared rays. Instead of going by skin tone, this sunscreen is designed to match your natural undertone and enhance your natural complexion. Choose the Warm shade if you have yellowish, golden or olive undertones, a darker complexion that tans more easily, or forearm veins that appear more green in colour. Use the Cool shade if you have bluish, red or pink undertones, fair skin that sunburns more easily, or forearm veins that appear more blue in colour.