K18 wanted a launch stunt that looked too strange to be real — so the hair-care brand built it for real.

The Unilever Prestige brand rolled a 150-pound ball of actual human hair, roughly 10 feet in diameter, through the streets of New York City to support the launch of its FutureIQ Biomimetic Hair Longevity Serum, a product that claims to help prevent hair loss. The activation, dubbed the Tumblehair, marks K18's first stunt of this scale, according to Kleona Mack, CMO of K18 at Unilever Prestige.

"We really wanted to do something that broke through and didn't feel like more of the same, but we also just wanted to get the conversation started," Mack told Marketing Brew. "I think that really pushed us to take this risk."

Building the hairball

K18 developed the Tumblehair with Uncommon, a New York-based creative agency. The ball contains 161 billion strands of real human hair and required human handlers to push it through Midtown, the West Village, Chinatown, and Seaport before it reached its final stop outside a Sephora in the Meatpacking District. There, visitors could watch product demos, receive complimentary scalp analyses, and take photos with the hairball.

Moving it was its own challenge. "We tried lots of different mechanisms to get it to move and roll," Mack said, "but ultimately needed human manpower to get it through the streets of New York City."

The hair came from K18 partner salons, which saved remnants from haircuts that would otherwise have been discarded. Representatives collected the hair in bags, and the strands were sewn together. Mack said the mix of colors and textures was deliberate, designed to represent the diversity of New York.

The size is also mathematical. K18 claims its serum helps users save 19,000 hairs on a single person's head. Multiplied by NYC's population of roughly 8.5 million people, that comes out to just over 161 billion hairs — the exact figure embodied in the ball.

Mack said seeing the hairs in person aimed to destigmatize conversations around hair loss. "People are experiencing, earlier and earlier in their lives, earlier than they expected, graying, hair loss, all of these things," she said. "We knew that a traditional way of going in was not going to get the conversation started, so what we were thinking was we really need something visually captivating, but we also need to be culturally relevant."

Grossed out? Good

K18 did not claim the hairball on its social accounts right away. Instead, the brand let the stunt draw onlookers and hoped word of mouth would carry it online.

Disgust was a welcome reaction. "We didn't fear it. We expected it, because we had those reactions every time we presented it to partners and our internal teams," Mack said. "Either people were disgusted or obsessed with it, and we wanted both, because whatever emotional reaction it gives you, you're still going to talk about it."

The numbers suggest it worked. According to creator marketing platform CreatorIQ, the stunt generated an estimated $150,000 in earned media value, plus more than 1.1 million social media impressions and nearly 30,000 total engagements. A significant share of that engagement came from paid collaborations with creators including What's Poppin? with Davis! and Myles Toe. The Tumblehair is slated to appear at future brand events, though Mack acknowledged the ball might need "a shampoo every now and then…to keep her soft and fresh."

Keeping it real

The activation arrives as unusual experiential marketing appears to be on the rise. Netflix recently placed a man inside a Los Angeles billboard for three days to promote its new movie The Last House. More than 40% of US ad buyers said they would spend more on experiential and in-person marketing this year, according to an IAB study cited by Emarketer.

K18's physical stunt also runs counter to growing audience distrust online, where anything slightly odd is often presumed to be AI-generated. Several viewers who saw video of the activation expressed surprise that it was real.

The shift is notable compared with beauty marketing of years past. In 2023, Maybelline digitally added eyelashes and a giant mascara wand to the London Tube and double-decker buses to promote a new mascara, fooling many viewers. At the time, a brand representative told Metro that Maybelline intended to provoke customers into questioning reality.

K18 wanted the same double-take — but today, that required a physical object, Mack said.

"For us, we wanted that 'Wait, is this actually real?' moment," she said. "We don't want to overpromise and underdeliver, so it was really important in this age of AI…for it to be real."

Source: Marketing Brew (https://www.marketingbrew.com/stories/k18-tumblehair-hairball-activation-ooh-strategy?utm_source=&utm_medium=syndication&utm_campaign=feed) / Source: privacy.morningbrewinc.com (https://privacy.morningbrewinc.com/policies)