Hi! The Renewal Mask was designed to be washed out, but can definitely be left on for a longer period of time (even overnight!). Our Leave-In Conditioner is the perfect hydrating product to leave in your hair :)

Hi! Typically this is a product that should be washed out, although it would not be harmful to apply to dry hair. The Leave-In Conditioner would be the best product to apply to both wet and dry hair!

There is no set amount, it really depends on personal preference and we always suggest playing around with how much works for your hair! However, if you're using weekly it can definitely last around 3 months (or more)--a little goes a long way. And our formulas are all super gentle on strands, we have never heard any complaints with customers with color treated hair but always make sure to check with your hairstylist as well :)

The Renewal Mask does not contain protein! The only product that contains protein is our Ritual Shampoo, which has Hydrolyzed Wheat Protein. Full ingredient lists can be found on each product page.

Yes, The Renewal Mask is great for all hair and can be used by anyone!