Study of a Novel Hyaluronic Acid Based Gel for Volume Deficiency in the Mid-face (FaceHyal)

Inclusion Criteria: * Aged between 30 and 84 years. * Seeking correction of the mid-face volume deficit, and agrees with the recommendation of the Investigator. * Accept the obligation not to receive any other facial procedures or treatments impacting facial volume augmentation at any time during the study. * Able to follow study instructions and likely to complete all required visits, as assessed by the Investigator. * Psychologically able to understand the study related information and to give a written informed consent * Have voluntarily provided written informed consent to participate in the study, and use of data privacy (sign the ethics committee approved Informed Consent Form), prior to any study-related procedure being performed. * Female of childbearing potential (sexually active, not sterile, nor postmenopausal for at least 1 year) must have a negative urine pregnancy test (UPT) at Visit 1 (or Visit 1b), and use a medically accepted contraceptive regimen since at least 12 weeks before the beginning of the study and for the duration of the study. * Affiliated to a health social security system. Exclusion Criteria: In terms of population: * Pregnant or breastfeeding woman, or planning a pregnancy during the study. * Scars, moles, tattoo, or anything on the Mid-face which might interfere with the evaluation. * Subject who had been deprived of their freedom by administrative or legal decision or who is under guardianship. * Subject in a social or sanitary establishment. * Subject participating to another research on human beings or who is in an exclusion period of one. * Subject having received 4,500 Euros in indemnities for participation in research involving human beings in France in the past 12 months, including participation in the present study (for France only). In terms of associated pathology: * Subject presenting any symptom which can be related to a medical condition that is likely to make the subject not being compliant with the study schedule, at the discretion of the investigator. * Subject suffering from a severe or progressive disease or any other pathology that may interfere with the evaluation of the study results. * Subject with known history of or suffering from autoimmune disease and/or immune deficiency. * Subject suffering from active inflammatory and/or infectious cutaneous disorders in or near the studied zones (e.g., herpes, acne). Subject with recurrent herpes in the Midface area is eligible if asymptomatic at time of inclusion. * Subject prone to develop inflammatory skin conditions or having tendency to bleeding disorders. * Subject with any history of healing disorders. * Subject having history of allergy or anaphylactic shock including hypersensitivity to hyaluronic acid, to lidocaine, or to antiseptic solution or any other amide type local anaesthetics. * Subject presenting a history of severe, evolutive, unstable, or recent allergies. * Subject suffering from porphyria. * Subject with a cancer in areas close to the injection site, and subjects with a melanoma * Subject with epilepsy or severe respiratory or cardiac function disorder. * Subject with severe renal or hepatic functions disorders. Relating to previous or ongoing treatment: * Subject having received treatment with a laser or ultrasound, a dermabrasion, a surgery, a deep chemical peeling, or other ablative procedure on the midface area within the past 12 months prior to inclusion. * Subject having received injection with a resorbable filling product in the midface area, defined as the zygomaticomalar and the anteromedial cheek regions, within the past 18 months prior to inclusion. * Subject having received injection with a resorbable filling product in the nasolabial folds and/or the eye shadows, within the past 12 months prior to inclusion. * Subject having received injection with a resorbable filling product in any part of the body of more than 8 mL within the past 12 months prior to inclusion. * Subject having received at any time injection with a slowly resorbable filling product (e.g., polylactic acid, calcium hydroxyapatite, combinations of ha and hypromellose) or with a non-resorbable filling product (e.g. polyacrylamide or silicone). * Subject having received at any time a treatment with tensor threads in the Midface area, or a surgery in the mid-face, or who plan to undergo any of these procedures during the study. * Subject under medications which may cause lipo-atrophy. * Subject using medication that reduce or inhibit hepatic metabolism (cimetidine, beta-blockers, etc) * Subject being under immunosuppressive therapy. * Subject undergoing a topical treatment on the test area or a systemic treatment: * Antihistamines during the 3 days prior to study start * Immunosuppressors and/or corticoids during the 4 weeks prior to study start * Retinoids during the 6 months prior to study start. * Subject having received a covid vaccine less than 4 weeks before the IPN-21-SENSE injection