With regular use, a leave-in conditioner will leave hair more resilient in the long run – especially important if you have a daily straightener habit you just can't seem to break. If you hair is prone to bouts of breakage, we recommend opting for a formula that's rich in ceramides, proteins and lipids – like Redken's Extreme Anti-Snap Treatment. (It also protects against heat, so is a great damage control product to use pre-blow dry for smoother styles.)

As with skincare, hyaluronic acid is also a bit of a wonder ingredient when it comes to dehydrated hair – and these days, can be found in everything from the best shampoo for dry hair, to leave-in treatments like The Inkey List's Hyaluronic Acid Hydrating Hair Treatment.