A better life for sensitive skin

GLOSSARY : Signs of age, wrinkles, firmness

Your face skin

Is there a term from the field of dermatology and cosmetics that you do not understand? Would you like to know what it means? View the full definition from the La Roche-Posay glossary.


Firmness is one of the defining characteristics of youthful skin. It is provided by the dermis, which acts as a cushion for the skin, and its collagen and elastin fibres. When young, the skin is firm and toned. With age, the dermal cells deteriorate and the fibres become looser: the skin loses its firmness.