Sérum T.E.W.L. is formulated with an ultra-high concentration of precious lipid-replenishing, repairing and protective oils. The combined action of its active ingredients restores a strong cutaneous barrier and strengthens the hydrolipidic film so skin is better able to shield itself from external aggressions. The serum’s formula envelops skin like an epidermal shield, providing intense nourishment and supreme comfort. Once repaired and protected, the epidermis maintains an optimal level of hydration. The initials TEWL stand for “transepidermal water loss”. This physiological phenomenon consists of the passive diffusion and evaporation of water through the layers of the epidermis. When the skin barrier is altered, these flows increase, resulting in epidermal water loss.