L'oreal Serie Expert Pro Longer Masque is a nourishing mask that is specially formulated with the exclusive Filler-A100 + Amino Acid technology to help renew and thicken your hair from root to tip. Help say goodbye to brittle strands with this powerful mask that helps to strengthen and fortify your hair, helping to reduce breakage and giving you fuller-looking locks. It works to help visibly reduce the appearance of split ends, leaving your hair looking healthy and smooth. For those with thin and fine hair types, this mask is a game-changer. It helps to thicken and resurface each strand, giving you the appearance of thicker, fuller, and more voluminous hair. Not only does this mask provide incredible results, but it also helps to add softness and shine to your hair. Infused with nourishing ingredients, it deeply hydrates and moisturizes your locks, leaving them feeling silky-smooth and radiant. As an essential building block of protein, amino acids are known to help promote hair growth, strengthen strands, and improve overall hair health.