Like the ocean, hair can be smooth one day, wavy the next, and sometimes needs to be cleansed of its oily surface. Get your unfathomable tresses under control with this Groupon.

Choose Between Two Options

• $149 for one hair-straightening treatment (a $450 value)
$289 for two hair-straightening treatments (a $900 value)

During each Yuko hair-straightening treatment—also known as Japanese hair straightening—the stylist applies a patented solution that works to banish frizz and curls. After a rinse, blowout, flatironing, and neutralizing, an additional blow-dry and ironing completes the three- to four-hour treatment, which leaves locks straight and smooth for 8–10 months.

Diva Salon

Sean Nakama has immersed himself in the philosophies of renowned hair-product brands ranging from Aveda and Matrix to Paul Brown Hawaii and L'Anza. This extensive education, augmented by experience gained during 15 years in the industry, informs Nakama as he presides over Diva Salon. His team of stylists wields Tigi color products to turn manes a summery blond or a steel gray that blends in with a bank safe’s interior. The stylists also employ products from Alterna, Kenra, and Original Sprout—which uses organic ingredients—as they transform hairscapes. In addition to cutting, coloring, and lengthening locks, Diva Salon’s aestheticians apply lash extensions.

Some hair-straightening products that claim to be formaldehyde-free include aldehyde compounds, which are similar to the carcinogen formaldehyde. Side effects may include nosebleeds, headaches, vomiting, and respiratory problems, among others. Learn more about the health risks here.