Best Co-Wash Ever! - Herbal Essence Hello Hydration Review. Hey loves, so I just wanted to tell you guys that I have fallen in love with Herbal Essence Hello Hydration conditioner. I mean my hair absolutely adores it! It's great for co-washing, as a plain ole conditioner, and I even started using it as my daily moisturizer (more on this later plus a tutorial). Check out my latest video stating exactly why I have fallen in love with this product! If you're currently on the hunt for a new way to moisturizer your hair, definitely check it out!