The Living Proof Perfect Hair Day Triple Detox Shampoo (£24) really does what it says on the tube. It'll seriously clean your hair and your scalp within an inch of its life (without making it feel tight or dry). The sulphate-free formula contains clever surfactants and chelating agents, which will remove both dirt, as well as chlorine and mineral deposits from your hair. The shampoo also contains charcoal powder to absorb excess oil, whilst the witch hazel moisturises your scalp. After using this shampoo, your hair will feel cleaner than ever — trust us, we've been a fan of this stuff for ages.