Herman Miller Cosm Mineral High Back Office Chair – Fast Delivery
The Herman Miller Cosm High Back Chair in Mineral is designed to deliver effortless ergonomic support with a light, modern look. Using Herman Miller’s intelligent Auto-Harmonic™ tilt system, the chair responds instantly to your body weight and movement, providing a smooth recline and a balanced, supportive feel without the need for manual adjustments.
With its high back design, the Cosm offers excellent upper-body support, making it a strong choice for long desk sessions in both home offices and professional workspaces. Finished in Mineral suspension with a Studio White frame, this version feels fresh, minimal and contemporary.
Available from UK stock for fast, free delivery.
Please note: the Cosm chair’s gas lift is engineered to create a softer, more flexible sitting experience — similar to the suspension in a vehicle — and may produce a light sound during movement. This is normal.
Key Features
• High back design with supportive mesh suspension
• Auto-Harmonic™ tilt adapts automatically to your posture and recline
• Mineral Intercept Suspension for breathable, temperature-neutral comfort
• Studio White frame finish
• Mineral base and mesh colour
• Height-adjustable arms
• Adjustable seat height
• Choice of castors for carpet or hard flooring
• Delivered by Wellworking fully assembled and ready to use
• Covered by Herman Miller’s 12-year, 3-shift warranty
Wellworking Says…
“The high-back Cosm chair in light Mineral is visually striking and adjusts seamlessly as you recline. A versatile option for both executive and home office spaces — and in stock for fast, free delivery.”
Herman Miller Cosm High Back Office Chair FAQs
What makes the Cosm different from other ergonomic office chairs?
The Cosm is designed to feel comfortable immediately, with minimal controls. Its ergonomic support adjusts automatically to your posture and movement, rather than requiring manual setup.
What is Auto-Harmonic™ tilt?
Auto-Harmonic™ tilt is Herman Miller’s self-adjusting recline mechanism. It responds to your body weight and movement to keep you balanced and supported as you lean back.
What is Intercept Suspension?
Intercept Suspension is a breathable elastomer mesh material that flexes naturally to support your back while remaining temperature neutral for all-day comfort.
Is this Mineral version available for fast delivery?
Yes. This Mineral / Studio White specification is stocked in the UK and available for fast delivery.
Does the chair require assembly?
No. This chair is delivered by Wellworking fully assembled and ready to use.
Why does the chair sometimes make a light sound when moving?
The Cosm uses a softer gas lift system to provide a more flexible seating feel. A light sound during movement is normal.
What castor options are available?
You can choose between castors designed for carpeted floors or multi-surface castors suitable for hard flooring.
What is the weight capacity?
The Cosm High Back chair supports users up to 159 kg (350 lbs).
What warranty is included?
The chair includes Herman Miller’s 12-year, 3-shift manufacturer warranty.
WARRANTY CLAIMS
All warranties are automatically applied by Wellworking and there is no need to register your product with the manufacturer.
Please keep your proof of purchase safe (it's easier for us to locate your order with the invoice or web order number) and, in the unlikely event a fault occurs, contact us by emailing service@wellworking.co.uk and we will arrange a service visit or replacement.
As a certified B Corp we are committed to putting sustainability at the core of all the products and services we offer.
Our products are designed with quality and longevity in mind and this is reflected in their long warranties.
We are working with our suppliers to reduce packaging and limit the use of non-recyclable packing materials. We take away all the packaging when we deliver products and recycle as much as we can within our offices to reduce the waste that goes to landfill.
