May is when most people pull their Birkenstocks out of wherever they've been since October and put them straight back on their feet.
That usually works out fine. But not always. Winter storage is hard on cork and leather, and a pair that looked okay when you put it away can come out with problems that weren't there in the fall. A few minutes of inspection before sandal season starts tells you what you're actually working with.
Here's the checklist.
Check the cork first
The cork midsole is the part that suffers most from winter storage — especially if the sandals were stored somewhere dry, cold, or with inconsistent humidity.
Look at the edge of the footbed, the thin strip of cork that runs around the perimeter between the upper and the outsole. What you're looking for:
Hairline surface cracks are normal. Cork expands and contracts seasonally. Fine surface cracking after a few years of wear is cosmetic and doesn't affect the structure.
Deep cracks that flex when you bend the sole are a problem. If the crack goes all the way through the cork and opens when the sole flexes, it will keep getting worse under daily wear. This is when cork sealing needs to happen before the season, not after.
Crumbling or powdering cork — where pieces are actually breaking off — means the cork has dried out significantly. It can usually be stabilized, but it needs attention. Left alone, it accelerates quickly once you start wearing the sandals again.
If you're seeing anything beyond minor surface cracks, read our guide to Birkenstock cork repair before going further.
Look at the sole
Flip the sandals over and look at the outsole — the bottom surface that contacts the ground.
You're looking for:
Tread worn smooth. The original Birkenstock sole has a distinct pattern. When that starts disappearing — especially under the ball of the foot and the heel — the sole is running thin.
Cork visible at the edges. Once the sole wears through enough that bare cork is exposed, moisture and grit start damaging the footbed directly. At that point a simple resole may also require cork repair.
Delamination. Any separation between the outsole and the cork above it, even a small gap at the edge, should be addressed before a full season of wear pulls it further apart.
The question to ask yourself is whether the sole has enough material left to protect your foot through another full season. If the answer is no, a resole done now is the right call. A resole done before the sole fails completely is straightforward. One done after — sometimes involving cork damage from an exposed footbed — costs more and takes longer to complete.
Check the straps and buckles
Work the buckles open and closed. They should move smoothly. A bent post, a bent buckle pin, or a loose rivet are all fixable, but worth noting before you're out the door.
Look at the strap material where it meets the footbed and where it bends most during wear. Surface wear is normal. Cracking through the strap, or any point where the strap is separating from the footbed, means the strap is getting close to the end of its life. We can replace individual straps in most cases.
Clean the footbed
The contoured footbed darkens and shows the impression of your foot over time. That's normal — it doesn't affect function.
For cleaning before the season:
- Use a soft brush and a small amount of mild soap with warm water
- Scrub the footbed surface gently, working in the direction of the grain on suede or nubuck footbeds
- Wipe clean and let dry completely — at least 24 hours — before wearing
- Do not submerge in water or leave in direct sun to dry
If the footbed has compressed to the point where the arch support no longer provides any lift, the footbed may need replacement. Footbed replacement is a separate service from resoling — you can do one, the other, or both.
Decide what the sandals actually need
After the inspection, you're in one of a few situations:
They're in good shape. Minor surface wear, straps solid, cork intact. Clean them up and wear them.
They need cork sealing. Cracks beyond surface level, or cork that dried out over winter. Cork sealing stabilizes the footbed and slows further breakdown. We do this as a standalone service and include it complimentary on all repair orders $75 and up.
They need a resole. Worn tread, compressing unevenly, or starting to separate from the footbed. Resoles are $75 and include complimentary cork sealing, conditioning, and free return shipping.
They need both. A footbed replacement and resole together is $115 with the same inclusions. For pairs with five or more years of heavy wear, this is usually the right answer.
When to send them in
May is the right time. Turnaround is faster before peak season, and you get the shoes back with enough time to break in the new sole before you're wearing them every day.
We accept mail-in repairs from anywhere in the US. Email us with what you're seeing, ship the sandals, and we'll assess and confirm the service before doing any work.
If you're not sure whether your pair is worth repairing, this guide walks through the honest answer for different conditions.
Contact us here or visit the Birkenstock repair page for full pricing and shipping instructions.