Sunscreen Efficacy Against the Reccurence of Lesions Post-sun Exposure in Acneic Subjects

Inclusion Criteria: 1. Related to the population: * Females and/or males (with at least 25% of male) * Age: adults from 18 to 40 years old and adolescent from 12 to 17 years old (33% to 50% of the total population) * Considered "healthy subject" by the Investigator * Being of Phototype I to IV * Subject with combination to oily skin * Subject who foresees sun exposure during the first 2 months of the study * Subjects must be registered with health social security or health social insurance (if required by national regulations) * Subject and/or parent(s)/legal representative(s) who have signed his/her/their written informed consent for his/her participation in the study (or his/her/their child participation in the study) and a photograph authorization * For woman of childbearing potential: committing herself to use effective contraceptive method since at least 3 months before the beginning of the study and committing to it throughout the study * Regular users of very high protection sunscreen products. 2. Related to the disease: * For adults and adolescents: subject with mild to moderate acne with a total of 10 to 40 acne lesions (at least 5 non-inflammatory lesions (open and closed comedones) and at least 3 to 10 inflammatory lesions (papules and pustules) maximum on the face, excluding the nose area), at the inclusion. * Subject prone to have recurrence of acne lesions in autumn (declarative) Exclusion Criteria: 1. Related to the population: * Having participated in another clinical trial within 4 weeks before the inclusion visit and for a longer period if required in the Investigator's opinion Taking part or planning to participate in another clinical trial during the study in the same or another investigation centre * Breastfeeding or pregnant or not willing to take necessary precautions to avoid pregnancy during the study and for at least 3 months before the inclusion visit (for the woman of childbearing potential) * Subject or parent(s)/legal representative(s) deprived of freedom by administrative or legal decision or under guardianship * Subject or parent(s)/legal representative(s) not able to be contacted in case of emergency * Subject admitted in a sanitary or social facility * Subject planning a hospitalization during the study 2. Related to the disease * Cutaneous pathology (psoriasis, atopic dermatitis, skin infectious disease of viral, bacterial, fungus or parasitic origin …) or dermatological condition (especially pityriasis versicolor, severe pigmentation disorders) on the studied zone other than acne liable to interfere with the data of the study * Severe acne * Clinical signs of hormonal disfunctions or hyperandrogenism * Excessive exposure to sunlight or UV-rays within the previous month * Having history of abnormal reactions from exposure to sunlight * Use of self tanning product during the previous month History of hypersensitivity or intolerance to any cosmetic product 3. Related to treatments * Use of a systemic or topical medication with anti-inflammatory or photosensitising products during the previous 2 weeks and for systemic medication with corticoids and/or antihistaminics during the previous 4 weeks * Use of a systemic treatment for acne during the previous month for antibiotics, zinc gluconate and hormonal treatment and during the 6 previous months for isotretinoin * Use of a topical treatment for acne during the previous month (benzoil peroxide, retinoid, antibiotics, azelaic acid…) * Use of anti-acneic or anti-seborrheic cosmestic care (containing alpha hydroxy-acids, retinoic derivatives..) during the 15 previous days * Use of other topical or systemic treatment during the previous weeks liable to interfere with the assessment of the cutaneous tolerance and efficacy of the studied product (according to the investigator's appreciation) * Any surgery, chemical or physical treatment on the experimental area within the 12 months prior to the study or foreseeing it for the duration of the study * Woman whose oral contraception is instaured or changed for less than 3 months