Hi Ylva! 💙
Thank you so much for your question! We totally understand that hair can need a little extra love after a lot of sun and saltwater ☀️🌊
The Moroccanoil Restorative Hair Mask is a protein-rich mask designed to strengthen and repair damaged hair, and it should only be left in the hair for 5–7 minutes before rinsing out. It is therefore not suitable for overnight use, as too much protein can make the hair stiff or dry if left on for too long.
If your hair needs intensive moisture for a longer period, we would rather recommend a moisturizing hair treatment that is made to be left on overnight 💧