This incredible Alterna Bamboo Anti-Frizz PM Overnight Smoothing Treatment is part 1 of your revolutionary 2 step system for long lasting smooth hair. This anti frizz system helps your hair resist frizz and humidity for longer lasting sleek blow drys. The PM overnight treatment helps to start the smoothing process while you sleep, & the AM blowout balm seals in the smoothness for hair that lasts for days. To use: At night apply the PM Overnight Smoothing Treatment to your dry hair before bedtime. Distribute it evenly throughout your dry hair, focusing on mid-lengths to ends and leave in overnight. Note: Both bottles are 150ml each and the treatments are bedding and pillow safe.