YOLU Relax Night Repair Shampoo Refill 400ml is a Japanese nighttime haircare shampoo designed to repair and smooth unruly or damaged hair while you sleep. Its concentrated repair formula targets weakened cuticles and frizz with keratin like proteins and moisture locking agents to restore softness and shine without weighing hair down. The gentle cleansing base removes impurities while leaving a lightweight protective coating that improves manageability and reduces morning tangles. Best for dry, wavy, chemically treated or frizz prone hair and for anyone who wants an easy overnight recovery step in their routine.