Lori Greiner invested in Sleep Styler, the hair-roller product featured on Shark Tank.
Sleep Styler was created by Tara Brown and uses soft, absorbent rollers designed to dry and shape hair while the user sleeps. Brown presented the product on Shark Tank, where Greiner made the deal and became its investor.
The product attracted attention because it combined two familiar beauty routines—hair styling and overnight drying—into one home-use item. Greiner has frequently invested in consumer products that can be demonstrated quickly and understood by a broad television audience.
Sleep Styler is sometimes confused with other beauty products shown on the series. The relevant Shark Tank investor was Lori Greiner, known for her strong focus on household and personal-care inventions.