Currently MONDAY’s range includes four shampoo and conditioner duos, each dedicated to a specific hair concern: Gentle (for delicate hair and scalps), Moisture (for dry hair), Smooth (for frizzy hair) Repair (for dry, damaged hair), Color Protect (for color-treated hair), Clarify (for oily hair), and Volume (for fine and flat hair). At only $8 for each bottle ($16 for the duo), it’s no wonder they’re so popular; all about making haircare more inclusive, products promise to offer salon-worthy results at a fraction of the cost. The Instagram-friendly, baby pink packaging and roster of celebrity fans (including Khloe Kardashian and Addison Rae) sweeten the appeal, too.