Enriched with detoxifying, restoring and oxygenating active ingredients, this serum offers a triple solution to your skin: it helps repair its barrier function, eliminates toxins and boosts radiance. It is able to breathe again and regains all its freshness and vitality. How to Use: Apply in the morning and evening before the Oxygen 3 Defense Cream or the Oxygen 3 Defense Fluid SPF15. Use as a 1 month intensive treatment, and to renew with each season change.