FLASH Study is a Post-Market Follow-Up PCMF designed to evaluate the tolerance and efficacy of STYLAGE Hydro by using a satisfaction questionnaire.

This is a prospective, in open, single arm and multicentric study designed to evaluate the tolerance and efficacy of STYLAGE Hydro.

Patients will be injected up to 2 mL of STYLAGE Hydro per area at each session. Three injection sessions 2 weeks apart are planned: one at visit 1 (D0), one at visit 2 (W2) and one at visit 3 (W4).

Proportions of subjects who are satisfied on the face 6 weeks after treatment initiation will be assessed. For each question of the questionnaire, the subjects who are satisfied are defined as subjects who rated "Somewhat agree", "Agree" or "Totally agree". Global aesthetic improvement according to independent evaluator and subjects' satisfaction will also be done during other visits. Safety parameters will be evaluated during the study period.

Inclusion Criteria:

1. Healthy subject.
2. Sex: female.
3. Age: between 30 and 70 years.
4. Subject having given freely and expressly her informed consent and data privacy consent.
5. Subject with signs of cutaneous dryness and lack of elasticity on the face, on the neckline area and if applicable on the neck (if neck is planned to be treated) following investigator assessment.
6. Subject willing to have photographs of the face, neck and neckline taken.
7. Subject psychologically able to understand the study related information and to give a written informed consent.
8. Subject affiliated to a health social security system.
9. Subject agreeing not to receive another aesthetic procedure (e.g., laser, dermabrasion, surgery, deep chemical peeling, surface peel, tensor threads, injection with a filling product) on the face, the neckline area and if applicable on the neck (if neck is planned to be treated) during the whole study.
10. Female of childbearing potential should use a medically accepted contraceptive regimen since at least 12 weeks before screening visit and during the whole study.
11. Subject agreeing to keep their usual cleansing / care products during the whole study period.
12. Subject agreeing to apply a SPF50 cream during non-intensive exposure to sunlight.

Exclusion Criteria:

1. Pregnant or breastfeeding woman or planning a pregnancy during the study.

2. Subject with a tattoo, a scar, moles, too many hairs or anything on the studied zones which might interfere with the evaluation.

3. Subject who had been deprived of their freedom by administrative or legal decision or who is under guardianship.

4. Subject in a social or sanitary establishment.

5. Subject participating to another research on human beings or who is in an exclusion period of one.

6. Subject having received 6000 euros indemnities for participation in researches involving human beings in the 12 previous months, including participation in the present study. (France only)

7. Subject suffering from a severe or progressive disease or any other pathology that may interfere with the evaluation of the study results.

8. Subject suffering from autoimmune disease and/or immune deficiency.

9. Subject suffering from inflammatory and/or infectious cutaneous disorders in or near the studied zones (herpes, acne, mycosis, papilloma…). Subject with recurrent herpes is eligible if asymptomatic at time of inclusion.

10. Subject having history of hypersensitivity to hyaluronic acid or to one of the components of the tested device, anaesthetic product or antiseptic solution.

11. Subject having history of anaphylactic shock or severe and/or evolutive / unstable / recent allergy.

12. Subject with a past history of streptococcal disease, such as acute rheumatic fever or recurrent sore throats.

13. Subject predisposed to develop keloids or hypertrophic scars.

14. Subject prone to develop inflammatory skin conditions or having tendency to bleeding disorders.

15. Subject having received treatment with a laser on the face, the neckline area or if applicable the neck within the past 6 months prior to screening visit.

16. Subject having received a superficial, medium, or deep peeling on the face, the neckline area or if applicable the neck within the past month, 3 or 12 months respectively prior to screening visit.

17. Subject having received injection with a reticulated hyaluronic acid (HA), on the face, the neckline area or if applicable the neck within the past 12 months prior to screening visit.

18. Subject having received injection with a non-reticulated hyaluronic acid (HA) or botulinum toxin on the face, the neckline area or if applicable the neck within the past 6 months prior to screening visit.

19. Subject having received at any time injection with a slowly resorbable filling product (polylactic acid, calcium hydroxyapatite, combinations of HA and hypromellose, HA and dextran microbeads or HA and TriCalcium Phosphate (TCP), …),a non-resorbable filling product (polyacrylamide, silicone, combination of methacrylic polymers and collagen, polymer particles, …) or tensor threads on the face, the neckline area or if applicable the neck.

20. Subject having started or changed her oral contraceptive or any other hormonal treatment during 12 weeks prior to screening visit.

21. Subject using medication such as aspirin, NSAIDs (ibuprofen, ketoprofen, naproxen…), platelet aggregation inhibitors, anticoagulants, vitamin C within one week prior to injection visit (V1) and agreeing not to take such treatments within 1 week prior to the second (V2) and third injections (V3).

22. Subject having history of immunosuppressors taking.

23. Subject undergoing a topical treatment on the test area or a systemic treatment:

    • Anti-histamines during the 3 days prior to injection visit (V1) and agreeing not to take such treatment during the study as far as possible;
    • Corticoids during the 4 weeks prior to screening visit;
    • Retinoids during the 6 months prior to screening visit.

24. Subject having changed her topical cleansing / care products within the month prior to screening visit.

25. Intensive exposure to sunlight or UV-rays within the previous month and foreseen during the study.