How often should I use this masque? Recommended use is really dependent on your individual hair needs! A great starting point is twice a month, but if you feel like your curls need a little more TLC you can use it weekly.
Can I leave this in overnight? No, it is not recommended due to the Rhassoul Clay used within the Masque. Although it has softening properties, it also has natural detoxifying properties that might dry out your hair if left on for very long periods of time. In general it's not great to keep your hair wet over night!