Schwarzkopf Gliss with liquid keratin is ideal for fine, flat, dry or damaged hair. The new repair formula with liquidized sea-collagen cares for your hair, gives it volume without weighing it down. Gliss works by re-constructing hair fibre to repair damage and repairs where you need it most, without over-treating healthy areas of your scalp. Gliss cell repair system contains proteins that are identical to the hair itself, hence able to repair the hair from deep within, making hair stronger