Speaking of moisturizing ingredients: You may also find your hair products taking up residency on top of your strands instead of soaking into them, “leaving the hair feeling coated or heavy,” says Michelle. Many are created in order to address a concern (dandruff, breakage, brittleness) or to work most effectively for a specific hair type (4C curls, wavy hair, gray hair). For our review of the best products for low-porosity hair, we enlisted the help of multiple editors, writers, contributors, and hair stylists—many of whom have hair that has difficulty absorbing products.