Search  for anything...
FOAMON

Replacement Seat for Herman Miller Classic Aeron Size B Medium (Black Mesh)

    • Based on 169 reviews
Condition: New
Checking for product changes
$175.95 Why this price?

Buy Now, Pay Later

As low as $29.33 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: 12 left in stock
Fulfilled by Amazon
Arrives Wednesday, Mar 5
Order within 4 hours and 27 minutes
Available payment plans shown during checkout

Features

  • Fits Your Herman Miller Chair - Measuring 20.25 inch Width x 18 inch Depth x 6 inch Height, our Herman Miller Aeron replacement parts are designed to fit any Classic Aeron chair size B. Replace your old chair seat with great ease!
  • Tough & Durable - Our Aeron Seat Replacement parts feature a reinforced, heavy-duty frame to ensure that it won't break, crack, or get damaged easily. Sit on your new cushion without worries!
  • Sit Comfortably - This seat is made of filament which offers fantastic ventilation, so you can stay cool all day. Our seat's black mesh fabric also matches the mesh of Herman Miller Aeron chairs.
  • Fuss-Free Installation - No need to call a handyman to put these chair seat replacements in place. This new Aeron chair seat comes with a manual that'll help you remove and replace your old seat.
  • Ready To Use - With this new Replacement Seat, there's no need to assemble mesh, and foam required. The seat itself comes ready to install so you'll only need a few minutes to revamp your Herman Miller Classic Aeron desk chair.

Brand: FOAMON


Color: Graphite


Product Dimensions: 18"D x 20.25"W x 6"H


Size: SIZE B MEDIUM


Back Style: Solid Back


Brand: FOAMON


Color: Graphite


Product Dimensions: 18"D x 20.25"W x 6"H


Size: SIZE B MEDIUM


Back Style: Solid Back


Special Feature: Durable


Product Care Instructions: Wipe Clean


Unit Count: 1.0 Count


Recommended Uses For Product: Office


Maximum Weight Recommendation: 300 Pounds


Style: Classic


Pattern: Solid


Room Type: Office


Age Range (Description): Adult


Included Components: User Manual


Shape: Rectangular Prism


Model Name: Aeron Size B


Arm Style: Armless


Surface Recommendation: Hard Floor


Furniture base movement: Swivel


Indoor/Outdoor Usage: Indoor


Furniture Finish: Graphite


Seat Depth: 18 inches


Fill Material: Foam


Reclining Position Count: 1


Tilting: No


Is Customizable: No


Is Foldable: No


UPC: 860003555958 860003555965


Form Factor: Plastic


Manufacturer: FoamOn


Item Weight: 4.76 pounds


Country of Origin: China


Item model number: Aeron Size B


Date First Available: September 30, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Mar 5

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Perfect Fit
This is a perfect fit for our Aeron chair that fell apart after more than 25 years of use. It seems to be as good quality wise as the original and was straight forward to install. Very comfortable with the same feel as the original.
Reviewed in the United States on February 2, 2025 by Milton C
    • Great replacement
Easy to install and perfect fit. Buy w confidence
Reviewed in the United States on January 25, 2025 by Andrea Zabkar
    • Glad I bought it
When the seat of my 30+ year old Aeron chair failed, I started looking for replacement chairs, and then read a Consumer Report review of office chairs. It still had the Aeron chair listed as one of their top choices. This encouraged me to look to repair rather than replace the chair, and I came upon this replacement seat. After watching several YouTube videos, I started the replacement process. For the most part, the process went smoothly. Getting the seat and the swing arms detached was relatively easy. Getting the replacement seat and one of the swing arms reattached was also relatively easy. Getting the second swing arm reattached was a bit of a challenge. I own what may be a first-generation Aeron chair, and as shown in the instructions, there are bushings and a spacer that were replaced on more modern versions of the chair. Dealing with the bushings and the spacer on this second arm was a bit of a chore. Add in that I am in my 70s, and don't have a good work bench to work on. Some choice words were uttered while trying to get the hole, bushing, and screw into alignment on that final connection. That said, I dd get it back together, and it seems to function just as it did before the tearing. I do wonder whether over time there has been some distortion/warping of the seat that made reattaching the second swing arm more difficult. In the end, it was worth the effort. I will note that my seat frame was intact, and it was only after i ordered that i noticed one could buy just the mesh insert and replace it. If I live long enough to need to replace the mesh again, this might be the route I pursue. It reduces the cost to about half of what this product runs. For now I am happy to have my chair back. ... show more
Reviewed in the United States on June 9, 2024 by A. M. Glaeser
    • GREAT Replacement
I recently got a 2002 Aeron Classic size B locally from someone and the chair was in great shape, but the seat was sagging some. It was clear that just replacing the seat would probably be the best bet as it obviously takes the most beating. I was a little hesitant when ordering this because the price was good and the promise seemed big. It kept the promise and is great! It also comes in this insulated tote bag with all of the tools in their own zipper pocket and honestly, the bag itself is just a big bonus. Overall, I've had the seat for upwards of a week, sit in it daily for long periods of time and it feels great! It looks like the original, everything matches up well from a coloring perspective and the mesh looks the same. I really recommend it for anyone who needs a new seat. ... show more
Reviewed in the United States on September 6, 2024 by M. Ruth
    • PERFECT FIT (for an Aeron size "B") ---- wrong hex key was sent
Review Image by Christian Christian
Review Image by Christian Christian
Review Image by Christian Christian
Review Image by Christian Christian
Review Image by Christian Christian
This is a third party replacement for the seat of an Aeron chair size-"B". It fits PERFECTLY for a size B. If you read someone complaining that it doesn't fit, it is because they ordered the wrong item OR the wrong item was shipped to them. But the item listed here, the one I have received fits a size B perfectly! NOTE: The amazon listing has clear images showing the dimensions of a size-B and size-C chair seat. It also has (and I found this to be the most useful) an image illustrating how the back of the chair has TWO screws for a size-C chair and ONLY ONE CENTERED screw for a size-B chair. I included a photo of my size-B chair for illustration. The good: - It fits perfectly and it's easy enough to replace. The Bad: - The product arrived with a torx screwdriver instead of a 4mm hex key. If you have a set of hex key at home, you're good. Otherwise get one here with a 4mm key. (Note: I only had an imperial set of hex keys and I found and used on that was close enough to hold securely) - The instructions are terrible (mostly ass covering with CAUTION boxes). But it's easy to install. Here are the simpler instructions: Removing the old seat: 1) Remove the large side screws holding the seat of the chair using the larger 6mm hex / Allen key 2) Remove the 2 sets of nuts/bolt forming the "collarbone" connector below the chair, using the provided 10 mm socket and the (or your) 4mm hex / Alen key Putting in the replacement seat: 1) Attach and screw in the 2 sets of nuts/bolt forming the "collarbone" connector below the chair, using the provided 10 mm socket and the 4mm hex / Alen key. ** IMPORTANT** do these ones first or (like me) you will have to redo it... if you put the larger screws in first, you won't be able to access the space to put in those smaller ones after. 2) Align the seat, insert and screw in the large side screws holding the seat of the chair using the larger 6mm hex / Allen key Conclusion: Bad instructions, wrong tools (but hey, they **included** tools, so it's not too bad!). Great seat, that fits perfectly! Verdict: If you have a size-B chair and need a new seat: GET IT herre!! ... show more
Reviewed in the United States on January 6, 2023 by Christian Christian
    • Good Replacement Seat
Delivered when expected and packaged to prevent damage. Came with excellent instructions and all the tools needed. Removing old seat and replacing it with the new one took approximately 10 minutes. Good value given how much a new Aeron chair costs.
Reviewed in the United States on November 6, 2024 by Peter
    • Perfect fit, correct tools...but I think the seat was guaranteed by Herman Miller
Someone pointed out that these Herman Miller Aeron chairs have a lifetime guarantee. Oops, I ordered this replacement when my mesh started to tear. Oh well, it fits perfectly and was easy to install. And a lot less trouble than dealing with a manufacturer warranty, I'll guess.
Reviewed in the United States on October 27, 2024 by Long Beach Native

Can't find a product?

Find it on Amazon first, then paste the link below.