I have just tried out the kerastase night serum (it came free with my order) and I’m finding it really quite lovely. It’s a leave in overnight product and I wasn’t sure how I would like that but it’s really light and softening

As others have said, I guess it depends on hair type and texture. What your hair needs. For example I found the Pantene mini treatments are super easy to use in the shower and they make my hair soft and shiny but the do contain silicone which can weigh hair down and isn’t very good for your hair. I’m turning to using serums after shower instead. I’d love to know if any one finds a good mask though.

I think its just a matter of trying different products and finding what works for you as everyones hair and scalp is different.
Lately I have been using theBio-Tech Repair by Schwarzkopf it contains cocoa butter and smells amazing. Comes in a green tub.

I don’t really use anything that is rinsed off in the shower. I use different hair oils, Kerastase, Biolage, Olaplex. For shampoo and conditioner I use Kerastase, Biolage and Matrix. I find these products work for me. I never really found hair masks or rinse out treatments did anything long term, just gave me smooth hair in that moment