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All the no-fuss footwear to get you through the year in style.

There are many categories in footwear, but the easiest of them is the slip-on shoe. The name says it all; just slip your feet right in there and you're all set. There are no bells or whistles—no hooks, laces, or other trappings that require effort. And in this era when comfort is key to getting dressed, the slip-on is more high-ranking than ever before, especially during the warm and breezy summer months.

Of course, not all slip-ons are one and the same. Some styles are best for formal occasions, while others are best for leisurely strolls. There are a few sub-categories (because fashion loves classifying), in particular, that all men should consider adding to their shoe rack: loafers, sneakers, espadrilles, boat shoes, and even slippers. These are the options that’ll get you through the year, summer or otherwise, with ease.

So, check out 20 of the best slip-on shoes, all of which require no effort whatsoever.

A clean white slip-on sneaker for less than 25 bucks? How can you say no?

Don't let the texture of Acorn's signature slipper fool you, because the tech fabric is made to be completely breathable and moisture-wicking. Which means you can wear 'em in summer and winter—and outdoors, too.

Espadrilles are to Soludos as tissues is to Kleenex, and shapewear is to Spanx. Need we say more?

Toms built its brand on sustainable philosophy, one with a charitable component. It did so with simple, sleek canvas slip-on shoes that do so much good—and in more way than one, too.

Tied to skateboarding culture, Vans, throughout the years, has offered easy, breezy styles for the and beyond. Which means you don't have to know how to kickflip to partake in the action.

From gyms to public parks to restaurants, you'll most likely see something from Adidas. It's a brand that offers styles that are completely adaptable. Just check out the name on this guy.

From people who use "summer" as a verb to actual, real-life sailors, the boat shoe is a summertime staple for a good reason. It's comfortable, casual, and slip-resistant, which comes in handy when you're tacking and jibing—or just dodging spilled G&Ts.

Allbirds, the direct-to-consumer behemoth, launched with a sustainable approach, offering shoes made of materials that are equal parts hardwearing, stylish, and environmentally-friendly. What's more, they're machine-washable.

Sustainability seems to be the name of the game when it comes to slip-on sneakers. Case in point: Thousand Fell, a relative newcomer to the footwear fold, offers eco-conscious shoes so great that we just had to endorse them.

With tassels and a classic vibe, Cole Haan, per usual, offers a great, genuine leather loafer at price that's too good to pass up.

Since the 1920s, Castañer, a family-run footwear company based in Spain, has been offering first-in-class espadrilles to the most discerning gents. Yves Saint Laurent was reputedly a big fan, so you know they're good.

It's hard to surpass the original, the guy that started it all. And when it comes to exceptional loafers, my friends, G.H. Bass & Co. is the OG.

Huaraches, Mexican shoes made of woven leather strips, are one of the oldest footwear styles in the Western Hemisphere, predating colonization. And just by looking at the exquisite texture, it's not hard to see why they've been around for so long.

Good Man Brand, like the aforementioned sneakers, started out the gate to do more than offer quality styles. Not only are these leather sneakers super spiffy, but part of the proceeds from each purchase will be donated to the Why Not You Foundation, an NGO that empowers and prepares kids to become the leaders of tomorrow.

It should'd be surprising that Valentino, a label steeped in richness and romance, has an effortless, eye-catching espadrille that lives up to its reputation.

The folks at Fear of God, the stewards of minimalist luxury and sultans of sweats, have shoes, particularly penny loafers, that—no shocker—stay true to their ethos.

Italians reputedly make the best leather goods, especially dress shoes. And Salvatore Ferragamo is right up there with the best of 'em, offering the fanciest oxfords and derbies around. Its prowess, however, also extends to sportier styles—like this guy right here.

The unassumingly luxurious Summer Walk loafer from Loro Piana isn't just a super-comfortable, high-end addition to a warm-weather wardrobe. It's also a bona fide status symbol in the art world. So, if you've got any gallery openings coming up, these are the shoes to wear.

At this point, horsebit loafers, shoes with an interlocking metal detail on the upper, are a dime a dozen. But if authenticity is what you're looking for, know that Gucci's Jordaan is the venerable elder statesmen.

In the '60s, J.M. Weston popularized the loafer with the its 180 Moccasin, a shoe that greasers, jocks, and all the cool kids wore with socks. Several decades later, you can still cop the stellar style, whether you slip it on with socks or not.