We've clicked through enough street style slideshows to know a thing or two about fashion footwear. And if there's something we've learned, it's that when your schedule is jam-packed with back-to-back shows at Fashion Week, it pays off to pair your sleek designer duds with your off-hours sneakers. So it's no surprise that you're more likely to spot a Nike swoosh than a red sole on the streets of New York, Paris, Milan, and London nowadays — although, never fear: the sky-high stilettos still make their obligatory appearance every season. But fashion girls don't deny themselves comfort, especially when comfort can come in such a stylish (and budget-friendly) package. When you're going for athleisure rather than athletic, the number-crunchers over at Rank & Style find that Nike's Internationalist shoe is the best bang for your buck. This throwback style — which tops the site's list of fashion sneakers under $100 — first popped up in 1982 at the New York Marathon and has remained popular because of its retro feel and signature tri-color combos. The Internationalist has a solid 4.6 stars, followed by a string of good reviews, on the Nike website. You'll find similar fanfare on other retailers: One Nordstrom customer writes, "These shoes are even cuter in person! I've worn them with short skirts, shorts, jeans, and sweats. I don't think I'd use them for hard-core working out, but for everything else they are great." For $85 a pop, we might just get these versatile sneakers in every colorway. Then, fully commit to the athleisure vibe with a graphic T-shirt. To cover all of our shoe bases, Rank & Style also ranked the best walkable sandals and party heels for summer — so the entire footwear spectrum is represented.