The IGK Mistress Hydrating Hair Balm ($29) is a leave-in conditioner that's especially helpful in the winter months as it serves as a humectant for your hair, drawing in water molecules and locking in that moisture. There's also coconut oil (to reduce protein loss), shea butter (to hydrate and protect) and Argan oil (to reduce frizz). Oh, and the cream has earned 20,000 hearts from Sephora shoppers, so it seems they're on to something.