Written By | Fashion Experts
On paper, Under Armour and Marine Serre might seem like an odd couple
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PARIS
It began with a baselayer. In 1996, Kevin Plank pulled on a tight, sweat-wicking compression shirt in a University of Maryland locker room, convinced there was a better alternative to heavy cotton T-shirts. That simple garment became Under Armour — a company that grew into one of the most recognized sportswear brands on the planet. Thirty years later, Under Armour is marking the occasion not with a retrospective, but with a collaboration with Marine Serre, the Paris-based designer whose work sits at the intersection of performance, philosophy, and provocation.
The result is a limited-edition HeatGear capsule collection launched June 5 — already generating the kind of conversation brands spend fortunes trying to manufacture.
The Partnership That Makes Perfect Sense (Now)
On paper, Under Armour and Marine Serre might seem like an odd couple. One is a publicly traded American athletic giant. The other is a LVMH Prize-winning French designer whose crescent moon motif has become fashion's most recognizable symbols.
In practice, the connection is intuitive. Serre, before she became a fashion designer, was a competitive tennis player — an elite one. The relationship between body, movement, and clothing is not abstract for her. It is lived experience.
"When we started talking with the Under Armour team, I realized we were speaking the same language," Serre has noted. "Just with different vocabularies."
The Collection: What It Is And What It Does
The capsule is deliberately minimal — black and white dominate throughout, focusing attention on cut, construction, and how the pieces move on a body.
Category Pieces
Women Shorts, sports bras, long-sleeve shirts, leggings, knee-length pants
Men Compression tops (long/short-sleeve), tanks, leggings, shorts
Every piece uses Under Armour's HeatGear technology — the moisture-wicking, body-mapping fabric that is the company's foundation. Serre's contribution is architecturally precise tailoring, lean graphic lines, and a bespoke print merging her signature crescent moon with Under Armour's heartbeat logo.
Two brands, two symbols, one surface. Neither absorbed into the other.
The Footwear: A Return From The Archive
Perhaps the most unexpected element is the reemergence of the UA Proto Speed II — a performance model from the brand's late-2000s archive, not commercially released since approximately 2008.
The return features layered textile uppers, leather paneling, and silicone co-branding on the toe and vamp. Archive mining has become fashionable, but what separates the best revivals is editorial judgment — making a genuine case for why this object is worth bringing back.
The Proto Speed II doesn't look like a revival. It looks like a future.
The Paris Pop-Up: Fashion As Immersive Experience
The collection launched alongside an immersive pop-up in Paris (June 5-7) — three days that tested how physical retail can serve as narrative rather than merely transaction.
Attendees described a space moving between athletic environment and gallery installation, presenting garments that are performance objects that also happen to be beautiful. It earned genuine coverage rather than manufactured buzz.
The Bigger Picture: Sport And Fashion, Finally Talking
The capsule arrives at a moment when the line between performance garment and fashion object has essentially dissolved.
What this collaboration represents is specific: a major performance brand making a genuine artistic argument rather than a marketing calculation. Under Armour approached Serre not because of her Instagram following, but because her thinking about the body and movement has something substantive to say to a company built around exactly those concerns.
For consumers: these pieces can be worn to train, but they don't have to be. They are functional enough to perform in and considered enough to wear away from the gym — garments that do not apologize for where they came from.
Availability
The collection is currently available on marineserre.com and at select Marine Serre retail locations, with a global rollout through Under Armour's channels planned for later in 2026. Given the early response, the most desirable pieces will likely become difficult to find quickly.
Under Armour has been making performance gear for thirty years. With Marine Serre, it is beginning to think about what those thirty years were building toward.
