It's a marine polysaccharide that acts on the extracellular matrix with an immediate filler effect. Derived from the isolation of a microorganism found in the regions of Brittany, France, it is a product that is directly metabolized by the microbiota which, once all simple nutrients are consumed, moves on to the metabolism of this high molecular weight polymer. Its superficial action is immediate and works as filler for skin grooves and smoother. ESP Seafill "It demonstrates that even a high molecular weight molecule is capable of activating biological pathways on the skin with truly surprising results."