The new Ouai Shampoo for Thick Hair ($28-$56) fights frizz and breakage in thick hair whether it's curly or straight. There's marshmallow root extract to detangle and highly nourishing avocado oil and shea butter to hydrate and protect. P.S. There's also a matching Ouai Conditioner for Thick Hair ($28-$56) for extra tackling of tangles.