If there is such a thing as “formal” sandals, the all-black Zurich silhouette from Birkenstock and Japanese retailer Beauty & Youth might fit the description. These Birkenstock x Beauty & Youth “Black” Zurich sandals may be perfect for occasions where wearing flip flops will make you feel a tad bit underdressed yet too hot to wear anything that’ll wrap around your whole feet. There’s also good news for people who find the iconic cork footbed of traditional Birkenstocks too hard on their feet; this time, the cork has been replaced with leather moldings to give a much smoother feel for the wearer. So the sandals are comfortable and all-black, but it doesn’t mean you should go overboard and start wearing them to match your pinstripe suit unless you really don’t mind your colleagues at work giving you weird fashion nicknames.