Oribe Serene Scalp Balancing Shampoo (£45.50) is ultra-luxurious. It's similar to the Kérastase Specifique Bain Divalent Shampoo formula in that its superhydrating and leaves your hair feeling silky with zero stripping or dryness. It has the added benefit of preventing your scalp from flaking, which is ideal in the colder months. The 250ml bottle is eye-wateringly expensive, but it does last a long time.