Kerastase Noctogenist Serum Nuit

Kerastase Overnight Softening Leave-in Treatment is a cream formulation that works to revitalize dull & tired hair, making it softer and bouncier, that it does to great effect. 

There is no residue and no scent, making it ideal for fussy people. You can also work as much into your hair as you want without it looking oily, your hair just gets softer and bouncier. There is less frizz but it really isn't an anti-frizz cream. 

The only problem is this 150ml bottle costs $105, so you probably won't be using as much of it as you want.