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Availability:
In Stock.
Arrives
Thursday, Sep 3
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Color: Graphite
Features
- [Compatible with Classic Aeron Size B Only] Designed to fit Herman Miller Classic Aeron Chair Size B Medium. Not compatible with Remastered models.
- [Full Mesh Seat Replacement] Complete seat assembly with tensioned black mesh to replace worn, sagging, or torn seats.
- [Exact Dimensions for Proper Fit] Measures 20.25 inches wide x 18 inches deep x 5.8 inches high for accurate alignment with the original frame.
- [Durable Graphite Mesh] Strong suspension mesh provides firm ergonomic support and maintains airflow during long sitting periods.
- [Easy Installation] Pre assembled seat includes instructions for straightforward replacement. No additional hardware required.
Brand: FOAMON
Color: Graphite
Material: Plastic
Product Dimensions: 18"D x 20.2"W x 5.8"H
Size: Medium
Brand Name: FOAMON
Additional Features: Adjustable Headrest
Unit Count: 1 Count
Recommended Uses For Product: Chair
Age Range Description: Adult
Included Components: Cushion
Model Name: B3D01
Surface Recommendation: Hard Floor
Indoor Outdoor Usage: Indoor
Model Number: B3D01
UPC: 860003555958 860003555965
Manufacturer: FoamOn
Manufacturer Part Number: 123
Material Type: Plastic
Frame Material Type: Plastic
Product Care Instructions: Wipe Clean
Seat Material: Fabric
Fill Material: Foam
Upholstery Fabric Type: Mesh
Color: Graphite
Back Style: Solid Back
Style Name: Modern
Pattern: Classic
Finish Types: Powder Coated
Theme: Professional classic
Shape: Rectangular Prism
Arm Style: Armless
Cushion Style: Boxed Edge
Leg Style: Pedestal
Item Dimensions D x W x H: 18"D x 20.2"W x 5.8"H
Size: Medium
Item Weight: 4.6 pounds
Seat Depth: 18 inches
Chair Backrest Width: 20.25 inches
Item Depth: 18 inches
Item Dimensions: 18 x 20.25 x 6 inches
Furniture Base Movement: Swivel
Reclining Position Count: 1
Maximum Weight Recommendation: 250 pounds
Assembly Instructions Description: Included
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Sep 3
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Graphite
The seat was a good replacement and fit exactly like the old one that broke on my chair. It came with the seat and the tools to replace it. Easy to install and it feels like a new chair, now I can keep using my chair.
Reviewed in the United States on June 29, 2026 by Amazon Customer
It fit perfectly. The color is an almost identical match. All necessary tools (of good quality) were included, as were a pair of work gloves. The instructions were useless, but you won’t need them anyway. To remove the old seat, take out the big bolts first, then the small ones. To install the new seat, install the small bolts first, then the big ones. There was also a metal flange clipped to the back of the old seat. I don’t know what purpose it serves, but I moved it to the new one.
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Reviewed in the United States on March 18, 2026 by BobMG
Color: Graphite
I have an Aeron chair (size B) that I bought in the late 90s. A few years ago the seat started to tear. Not bad after 20+ years of almost daily use. I bought a replacement mesh which turned out to be a bad idea. It didn't quite fit and it wasn't made of the same stretch material as the original seat. Ok, lesson learned there. So I bought this and it was a perfect replacement. It's an entire new seat, not just the mesh. The mesh is the same stretchy material as the original. It looks identical to the original seat as far as I can tell. Replacing the seat was pretty easy. The instructions were good and it came with the tools needed. I think it took about 20 minutes and I was done. If you've made an investment in this chair, I think it's worth it to spend a little more getting this replacement seat so you have the official product. I'm writing this review 2.5 years later in Feb 2026 and the seat is still great. Zero problems, no regrets.
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Reviewed in the United States on February 4, 2026 by Matt
Color: Graphite
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!!
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Reviewed in the United States on January 6, 2023 by Christian
I had enjoyed my Aeron B for 20 years before the seat mesh started to tear. After researching a lot of options, I was happy to find this quality replacement. The seat fit perfectly, came in a classy insulated bag with a set of decent tools. The matching cushion insert was a bonus and usually not included with other seat replacements. The instructions were a bit confusing -- you can find better tutorials on Youtube. But all in all, an excellent buy at a very fair price!
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Reviewed in the United States on March 24, 2026 by shom
Color: Graphite
A very uncomfortable replacement for the original seat. There is a ridge of foam at the front edge that hits right across the back of the thigh that isn't there in the original - I compared them. The whole point of the real Aeron seat is that it doesn't do this, you can sit for hours without your legs getting constricted. This is really uncomfortable and I'm thinking about returning it. Trouble is that it was such trouble to install I don't want to have to do that again. I'll live with it for a couple of days and see how it goes. But if I were to try this in a store I would definitely not buy it. Update, after sitting on it for a couple of hours I'm returning it. This is nothing like the real thing. It's so uncomfortable that it's unusable. With my old seat restored, though not perfect, my chair now feels right again. Final grace note: the tools supplied DON'T FIT and are useless. I used my own tools to make the original swap but tried theirs for the restore, The big hex wrench that fits the hip bolt does fit, but the others don't. So you'll need your own tools. Word of warning, the smaller wrench for the seat bars is NOT 4 mm. It's maybe 3.5. I have no explanation for all the favorable reviews. I downgraded from 2 to 1.
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Reviewed in the United States on December 15, 2024 by stemper
Color: Graphite
I've had this seat replacement for about 8 months ago and probably would not buy it again. the seat fabric is noticeably more giving than the fabric on the original seat. This has the effect of putting too much pressure on the front of your thighs where the pad is. Looks-wise it's a solid copy, and the wear and tear thus far seems minimal.
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Reviewed in the United States on June 8, 2026 by Will Rogers
Color: Graphite
Great replacement for worn or broken Aeron B sized seat. I've had mine for about 15 years before I even had a problem with it. This was a great replacement as it came with all the required tools. I would however suggest using youtube installation instructions instead of the provided one, their method was a bit easier in my opinion. Hoping this chair can last me many many more years now!
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Reviewed in the United States on July 7, 2026 by Daylin E Criswell