UV rays are a major cause of the development of actinic keratoses and skin cancers. Actinic keratosis appears as a thick, scaly, or crusty plaque on areas of the skin most frequently exposed to the sun, such as the face (and the rest of the head, including the hairline and scalp), ears, neck, arms, and hands. These are precancerous skin areas. They are indicators of skin DNA damage and the risk of developing non-melanoma skin cancers. People with fair skin (phototypes I-II) are at the highest risk of developing this type of lesion. Anthelios 100 KA+ Med is a medical device indicated for the prevention and protection of highly photosensitive skin against the development of actinic keratoses and non-melanoma skin cancers.