For years, Outerknown’s Blanket Shirt has dominated the shirt-jacket market. That may be due to its timeless flannel-like styling, or perhaps its unbeatable comfort has kept it relevant. Either way, it has earned a spot in the annals of men’s fashion history.
But Kelly Slater’s apparel brand isn’t content to rest on its laurels. It’s always looking for ways to push the envelope, even regarding its catalog’s long-time staples.
To that end, the brand gave its most iconic piece a major sustainability and innovation upgrade with the Outerknown Kelsun Universal Blanket Shirt.

GP100 Winner
Outerknown Kelsun Universal Blanket Shirt
Specs
Traditional Fabric | 70 percent regenerative organic cotton |
Innovative Fabric | 30 percent Kelsun alginate fiber |
Fit | Classic/relaxed |
Without sacrificing the shirt jacket’s comfort, fit or styling, the brand swapped out its typical cotton twill fabric for a blend of cotton and seaweed—yes, really.

Usually, this kind of change requires sacrifice; some facet of the product inevitably suffers. But Outerknown has managed to skirt that pitfall entirely, producing yet another exceptional style piece that remains true to the original.