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06.05.2026

Under Armour Welcomes Tinx as New Brand Ambassador

The partnership kicks off with Summer of Outside, a movement and event series rooted in feeling good, getting offline, and reconnecting with yourself and others

Under Armour today welcomes Christina Najjar, better known as Tinx, as its newest brand ambassador, representing both UA footwear and apparel.

 

A creator, entrepreneur, bestselling author, and one of the most influential voices shaping modern conversations around confidence, wellness, and self-worth, Tinx joins the UA family as the brand continues to broaden its definition of performance.

 

The partnership begins with Summer of Outside, a new event series inspired by the movement Tinx created and her annual commitment to spend less time on her phone, and spend more time outdoors, prioritizing human connection, and doing the things that make her feel her best.

 

The series will make stops in San Francisco, Chicago, and New York City, bringing together movement, community, and the rituals Tinx has become famous for. Each meet up will feature movement, product giveaways, Christina’s Café pop-up experience, and moments designed for attendees to disconnect, recharge, and leave feeling better than when they arrived. 

 “I’ve always believed that feeling good doesn’t have to be complicated. Sometimes it’s a workout. Sometimes it’s a walk with friends. Sometimes it’s just about getting outside and putting your phone away for a while. Under Armour understands that feeling good looks different for everyone, which is why I’m so excited to partner with them for our Summer of Outside. This movement is about creating space for people to find joy and do what makes them feel good - outside!”

 

-TINX

As part of the partnership, Tinx will also curate Tinx’s Picks, a rotating collection of her favorite Under Armour styles and everyday essentials. Throughout the year, she will collaborate with the brand on content, experiences, and product storytelling that reflects how women actually move through their lives.

“Tinx has built a deeply loyal community by being refreshingly honest, relatable, and unapologetically herself. That’s where we are headed as a brand and how we want to show up for women. Because performance isn’t just about PRs or time spent in the gym. It’s about how you show up for yourself every day.”

 

-Tyler Rutstein

SVP of Americas Marketing at Under Armour

Through her wildly successful SiriusXM live radio show, It’s Me, Tinx; her New York Times bestselling book The Shift and her novel Hotter in the Hamptons, both of which are being adapted for television; and her daily chats with her loyal followers, Tinx has established herself as a trusted source for advice, humor, and perspective for a generation of women navigating modern life.

 

Together, Under Armour and Tinx will bring that mindset to life through both digital content and IRL experiences, showing that taking care of yourself doesn’t have to be extreme.

Tinx

Follow @UnderArmourwomen, @underarmour and @Tinx for updates on Summer of Outside and upcoming events.