Just when you thought Birkenstock's Boston clog couldn't get any better, contemporary South Korean brand ADER ERROR is here to turn things up a stitch. To start, the ADER ERROR x Birkenstock 1774 Boston Clog maintains the same iconic shape that made us fall in love with the corkish mule 50 years ago.

Happy birthday, Birks!

The only real stylistic deviation comes in the form of a single fold-over flap that's stitched to the upper with subtle thread detailing.

When it comes to reinterpreting classics as treasured as Birkenstock's beloved Boston clog, less is almost always more.

Even the electric "Ultra Blue" suede that lines the upper is a cerulean relic we've seen bestowed upon several Birkenstock classics, including the Arizona slide and Kyoto slipper.

The combination of such a captivating hue and classic cork footbed is both decidedly meek and hard to ignore in a way Birkenstock has become very familiar with recently.

Particularly, it's Birkenstock's high-end 1774 line that reimagines the brand's classic makes in a way that transcends casual-clog territory and straight into the dressy shoe category.

Ok, so maybe these clogs aren't black-tie appropriate, but there is still a palpable level of refinement that deserves to be acknowledged.

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