Party Shirt International

Description:

PSI (Party Shirt International) was born from a tiki bar idea and a lifelong obsession with wild shirts and wilder adventures. We’ve always believed the best gear isn’t just worn—it’s lived in. From powder days to desert hikes, river runs to bike trails, late-night pizza missions to wherever the day turns strange and good, our party shirts are made to show up loud and keep the vibe going.
We dig through thrift stores, estate sales, and dusty corners of the world to find inspiration in bold prints and forgotten gems, then turn that energy into shirts built for today’s adventures. PSI sits somewhere between outdoor performance and full-send celebration—made for riders, skiers, surfers, climbers, runners, and anyone who thinks “why not?” is a solid plan.
We’re a 1% for the Planet member, because the wild places we love deserve to stay wild. But mostly, we’re just trying to add more color, more chaos, and more good times to the outdoors. If you’re wearing a PSI shirt, you’re probably up to something.

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