And for so long, these little bars got a bad reputation for leaving behind residue at the scalp, stripping the strand, or leaving a filmy residue. (If you suspect yours might be doing this, here’s what to know.) However, the new batch of bars delivers: They’re often made with high-quality, hydrating actives, too. Maintain Solid Shampoo, HiBar ($12.95) Murumuru Butter & Rose Shampoo Bar, Love Beauty And Planet ($4.99) Hydrating Shampoo, Bar None ($12) Coconut & Hibiscus Rhassoul Clay Shampoo Bar, Shea Moisture ($9.99) Hair & Body Shampoo, Daughter of the Land ($19) Shampoo Bar, by Humankind, $13 Damage Control Shampoo Bar, Ethique, $16 Lullaby Shampoo Bar, Lush, $12 Hydrating Shampoo Bar with Aloe Vera, Christophe Robin, $22 Charcoal Shampoo Bar, Basin, $9 Lavender Coconut Milk Bar, Meow Meow Tweet, $12 Balancing Shampoo Bar, Unwrapped Life, $14 Handcrafted Shampoo Bar, Skinny & Co. ($16)