Marine Serre and Under Armour revive HeatGear and Proto Speed sneaker

Marine Serre and Under Armour have found the sharpest possible meeting point for fashion and sportswear: the baselayer. Their first capsule, launched June 5, reworks HeatGear and revives the late-2000s Proto Speed sneaker as the UA Proto Speed II, shifting the collaboration away from logo-heavy novelty and toward product with a designer point of view. Under Armour has folded the release into its 30th anniversary year, making the project feel like both a tribute to the brand’s beginnings and a signal of where it wants its future to sit.

The rollout was built to move from niche to global. The capsule launched exclusively on marineserre.com, at select Marine Serre retail locations, and through an immersive Paris pop-up at Rue de Turenne, 75003, running June 5-7 before expanding later in the summer on UA.com. That strategy suits the clothes: this is not a loud, all-over print collaboration so much as a tightly edited one, in black and white, with co-branded language that merges Marine Serre’s moon with the Under Armour logo.

The collection centers on what Under Armour says started the company in the first place, the baselayer, and that choice gives the collaboration its precision. Marine Serre has built her house around a moon-patterned second skin, a signature that already treats the body as a site of protection, tension and movement. Here, that language meets Under Armour’s performance credibility in a way that feels unusually direct. The collection includes men’s and women’s apparel, and the line between sport and street is deliberately porous, which is exactly where Marine Serre is strongest.

The sneaker is the headline object. The UA Proto Speed II returns for the first time since the late 2000s, giving the capsule a revival piece that reads as much archival as it does current. For Marine Serre, the benefit is obvious: Under Armour lends real technical authority to a label already fluent in silhouette and attitude. For Under Armour, Marine Serre supplies fashion legitimacy without sanding off the brand’s athletic core. Yuron White, Under Armour’s senior vice president and general manager of sportswear and collaborations, framed the partnership as instinctive because both brands begin at the baselayer and build from deliberate repetition and purposeful execution. That is exactly what makes the capsule work: it does not chase fashion’s idea of sport, it makes performance product look newly inevitable.