Birkenstocks are up to 40% off at Zappos — here's 9 rare sandal deals I'd shop now

If comfort is what you're after, these Birkenstocks are the way to go. The flexible sandals offer tons of support thanks to their sturdy and adjustable buckle strap closures and a hook-and-loop back strap. They're also waterproof, so they can keep up on your outdoor adventures.

With four strap colors to choose from, these platform sandals are super easy to style. They have a contoured footbed to support your feet, too.

If you need a little extra support from your sandals, this pair is the way to go. Featuring three slender straps with adjustable buckles, the slip on sandals offer an enhanced fit with targeted contouring and cushioning in the footbed.

These Birkenstocks feature just one oversized buckle for a touch of trendy. But style isn't the only thing these sandals are known for — comfort is at the forefront of this model. Their cushioned footbed absorbs shock and mimics the shape of a healthy foot, while the medial and metatarsal arches support the instep and ball of your foot.

If you're a fan of animal print, these Birks are the ones for you. Sporting a metallic zebra pattern, these iconic slides offer the signature comfort of the Birkenstock footbed with some fun flair.

These classic canvas Birkenstocks just got a glamorous update! Glossy oversized buckles add a fun twist of style while the slide sandal's cushy footbed is as comfortable as ever. This version of the sandal is made from nubuck leather that boasts a natural, rustic appearance. The sandal comes in a few different colors, although, prices may vary.

This is yet another variation on our favorite classic Birkenstock slide — and this time they're super shiny. The slides are also decorated with a broader buckle design for a bold yet fun summer look.

A twist on the classic Arizona sandals, these have a leather insole, lining and upper. They're available in Faded Purple and Antique White hues, but only a few of these Arizona Leather Sandals are left in stock, so act fast!

Triple the straps for triple the style! These Papilio by Birkenstock platform sandals have three straps with silver-colored metal straps. Reviewers love their comfortable, adjustable fit.