Skin care experts and biochemists consider masks woven from bio cellulose – an all natural fiber – to be the gold standard for hydrating and treating skin. Bio cellulose mask fabrics provide skin-tight dermal adhesion, allowing them to transfer cosmetic ingredients very efficiently. The texture of a bio cellulose mask feels like a cool, moist gel but its underlying structure is incredibly strong and resilient. Bio cellulose masks do not dry out during application.