Mexico City's Hermanos Koumori Is Building the Running Brand Nobody Asked For (And Everyone Needed)

There's a version of this story where two guys from Mexico City discover running, decide the gear is ugly, and start making their own. That version is true. The actual arc of Hermanos Koumori is stranger and more interesting than that — starting with fictional airline branding, passing through a viral Instagram T-shirt, and landing somewhere between Adidas collab partner and FIFA World Cup 2026 official jersey maker.

Alex León and Alex Sandler launched HK in 2018 as a streetwear project — graphic tees, 5-panel caps, a made-up airline called Aerolíneas Populares. León had an industrial design background. Sandler studied economics. Neither of them was thinking about running. Then they both started running, looked down at what they were wearing, and hated it. In 2020, they released a single graphic tee that said Post Running High. It went viral. "The Post Running High tee became a turning point because it helped us realize people weren't only connecting with the product, they were connecting with the culture around it," Sandler told Field Mag. They pivoted to running entirely — not because a trend deck told them to, but because the category was theirs to lose.

What makes HK worth paying attention to isn't the Adidas partnership or the World Cup jerseys, though those are real. It's the anti-literal approach to identity. No cacti. No alebrijes. No western fonts that scream Mexico for people who've never been. Instead, León and Sandler translate CDMX's architecture, geometry, and volcanic color palette into apparel — earthy greens, sandy neutrals, semi-sheer coach jackets, two-in-one shorts — with a design sensibility that owes as much to Japanese minimalism as it does to the Tepito street grid. Their five flagship stores, designed with Chinese architecture studio OAOA, aren't running shops. They're design spaces with rocks and raw surfaces that feel more like galleries than gear retailers.

The brand also operates the way good scene-builders always have — group runs, pop-ups, collabs with local artists and electronic music platform MUTEK MX — rather than the way brands with marketing budgets pretend to. The customers aren't just runners. They're architects, photographers, designers. People who think about objects and how objects make them feel. "For us, premium isn't just about using the most expensive fabric," León told Field Mag. That's the kind of thing brands put in press releases and don't mean. HK's stores, community calendar, and product catalog suggest they actually do.

The timing is real, too. Statista Consumer Insights' 2025 report puts Mexico among the world's leading running markets, with nearly a quarter of respondents saying they run or jog at least occasionally. The global running boom has been well-documented — Satisfy, Bandit, District Vision, Pruzan have all carved out space in the design-conscious end of the market. HK belongs in that conversation. The difference is the geography and the origin story. This isn't a brand built to supply a trend. It's a brand that built a community in one specific city, then let the rest of the world find it.

The easiest knock on any small running brand right now is that it's just aesthetic — another clean colorway worn by someone who looks better in it than you do. HK could be that. The Adidas collabs and World Cup jerseys create easy cynicism fodder. But the actual product philosophy — design for before, during, and after the run; build spaces that feel like part of the brand; don't slap your heritage on as decoration — reads less like a branding brief and more like a shop that knows what it is. That's rarer than it sounds.