Seat Foam Insert for Herman Miller Aeron Chairs Size C by OLS
Seat Foam Insert for Herman Miller Aeron Chairs Size C by OLS is backordered and will ship as soon as it is back in stock.
Warranty, Shipping, Cancellation, Return & Refund Policies
Your Seat Foam for Herman Miller Aeron Classic chairs (Size C) is covered by a 2-year warranty. Shipping is free within the contiguous USA, and international shipping is available at the best available rates. For more details, please review our full Cancellation, Return, and Refund Policies.
Installation and Customer Support
For installation, please watch the video below on this page or visit our Aeron repairs and maintenance tutorial page.
If you are having any issues with your Aeron Classic Size C Seat Foam by OfficeLogixShop, please contact our customer service team to file a ticket. Please allow 24 to 48 business hours for the team to review and address your inquiry.
Description
Description
Seat Foam Insert Replacement for Herman Miller Aeron Chairs Size C (Large) by OfficeLogixShop
This product is designed and manufactured by OfficeLogixShop. It is not an OEM Herman Miller part. “Herman Miller” and “Aeron” are referenced solely to identify the compatible chair model. OfficeLogixShop is not affiliated with or endorsed by MillerKnoll, Inc.
Restore the premium comfort of your Herman Miller Aeron Size C with our specialized Seat Foam Insert. The original foam pad is crucial for cushioning the front edge of the seat frame, but it degrades over time. This high-density replacement is contoured specifically for the wider seat pan of the Size C Aeron, eliminating thigh pressure and bringing back that "like-new" seating experience.
Comfort Restoration: A simple, tool-free upgrade designed exclusively for the wider seat of the Aeron Size C!
Why Replace Your Seat Foam?
If you feel the hard plastic frame pressing into the back of your legs, your foam insert has likely flattened or disintegrated. This is especially common in older chairs. Our OfficeLogixShop foam insert provides a fresh layer of supportive cushioning, ensuring circulation isn't cut off during long work sessions.
Key Features
| Feature | Benefit |
|---|---|
| Size C Exclusive | Wider design fits the specific dimensions of the Large Aeron seat pan. |
| Premium Density | High-quality polyurethane resists flattening for long-term support. |
| Pressure Relief | Softens the hard seat edge to prevent leg fatigue and numbness. |
| Tool-Free Install | Simply tucks into place under the mesh - no screwdriver needed. |
| Adhesive Strip | Includes an adhesive backing to keep the foam securely in place. |
What's Included
This package includes One (1) Seat Foam Insert for Size C. It does not include the plastic seat pan or mesh. It is compatible only with the Size C (Large) Aeron Classic.
Technical Specifications
| Specification | Details |
|---|---|
| Compatibility | Herman Miller Aeron Classic Size C (Large) ONLY |
| Material | High-Density Polyurethane Foam |
| Color | Dark Grey / Black |
| Installation | Tool-Free (Peel & Stick / Tuck) |
Chair Size Identification
Please double-check your chair size before ordering to ensure this foam fits. Feel for the raised dots under the upper back frame lip:
| Size | Dots | Compatibility |
|---|---|---|
| Size A | One dot | ✗ Not Compatible |
| Size B | Two dots | ✗ Not Compatible |
| Size C | Three dots | ✓ Compatible |
Upgrade your Size C Aeron with a fresh seat foam insert and enjoy steady, supported sitting once again.
For installation videos and a guide to checking your chair size, please scroll down below.
Guides & Tutorials
Installation Guide
Removing the old foam and tucking in the new one is simple. This guide covers the method for all sizes. (Starts at 2:05)
Size Identification
Confirm you have a Size C (3 dots) before buying. This video shows exactly where to look.
Product Highlights
Custom Fit for Size C
Using a smaller foam insert on a Size C chair leaves gaps that can cause discomfort. This insert is specifically cut wider to cover the full width of the Size C seat pan, ensuring consistent support.
Quick 2-Minute Install
You do not need to take the seat mesh off! Simply lift the front edge of the mesh with your fingers, slide the old foam out, and tuck the new foam into the same space.
Secure Adhesive Backing
Includes an adhesive strip on the bottom. Peel off the backing paper and stick it to the plastic frame to ensure it stays perfectly in place and doesn't shift while you sit.
Size C Only
This foam is too wide for Size A and B chairs. It is designed exclusively for the Size C (Large) Aeron. If you have a Size A or B, please check our standard size listing.
Service & Support
2-Year Warranty
We stand behind our quality. We guarantee our Size C foam inserts against flattening and deterioration for 2 full years.
Global & Domestic Shipping
Free shipping in the USA and the best international shipping rates available for global customers.
Local to Columbus, OH?
Want to ensure you have the right size? Visit our Lewis Center showroom to check the Size C foam in person.
Frequently Asked Questions
Will this fit a Size A or B Aeron?
No. This foam is too wide for Size A and B chairs. It is designed exclusively for the Size C (Large) Aeron. If you have a Size A (1 dot) or Size B (2 dots), please check our standard size listing.
Do I need to take the seat mesh off to install this?
Not at all! You can simply lift the front edge of the mesh with your fingers. The old foam usually slides right out. Then, just tuck the new foam into the same space. It's a quick 2-minute job.
Does the foam come with adhesive?
Yes, our foam inserts typically include an adhesive strip on the bottom. You peel off the backing paper and stick it to the plastic frame to ensure it stays perfectly in place and doesn't shift while you sit.
What if my old foam is crumbling and stuck?
This is common with very old chairs. If the old foam is sticky or falling apart, we recommend using a flat plastic tool (like a putty knife or an old credit card) to gently scrape the residue off the plastic frame before installing the new one. This ensures a clean, smooth surface for the new foam to adhere to.
