Ergonomic Office Seating

Herman Miller COSM Chair High Back Leaf Armrests

★★★★★ View customer reviews

$2,445.00 $2,999.00

In stock • Dispatch in 1-2 business days

Color Glacier

Glacier Canyon Mineral Graphite

In stock & ready
to ship

Delivery across
Australia & New Zealand

Try it at our Sydney &
Melbourne showrooms

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warranty & support

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Australia Wide Delivery Fast and reliable delivery

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Melbourne & Sydney Showrooms Purchase with confidence

Key Features

Effortless Comfort, Beautifully Engineered

The Herman Miller Cosm delivers instant, personalised comfort without the need for complicated adjustments. Its Auto-Harmonic Tilt automatically responds to your body, posture and movement, providing balanced support whether you sit upright or recline.

The continuous high-back suspension conforms naturally to your body while promoting airflow for lasting comfort throughout the day. Sculpted Leaf Arms offer relaxed support without restricting movement, while Cosm’s refined silhouette brings a light, elegant presence to any workspace.

Key Features

Auto-Harmonic Tilt for intuitive, self-adjusting support
High-back suspension provides continuous ergonomic comfort
Breathable, flexible Intercept suspension
Sculpted Leaf Arms support natural movement
Lightweight yet durable construction
Ideal for shared workspaces and multiple users
Designed by Studio 7.5
Available in Glacier, Canyon, Mineral and Graphite

Simply sit down—and Cosm does the rest

Every detail matters

Comfort in Every Curve Leaf Arms

Cosm’s Leaf Arms cradle your elbows with a broad, softly supportive mesh surface, offering a comfortable resting place as you work, read or pause.

Breathable by Design

Airy suspension mesh meets a smooth Glacier finish, combining an open, lightweight feel with a calm, coordinated look.

Find Your Colour

Choose from Graphite, Mineral, Glacier and Canyon to complement your space, with the same sculptural high back and distinctive Leaf Arms.

The Structure Behind the Comfort

A closer look at Cosm’s sculpted frame reveals the curved supports and connection details behind its flowing silhouette.

Comfort in Its Purest Form

Light, fluid and effortlessly responsive, Cosm moves with you like a natural extension of the body.

Zero Gravity, Effortless Comfort

Cosm moves in perfect harmony with your body, creating a weightless sense of support from the moment you sit down. Lean back, breathe out, and let the chair do the rest.

See It in Action

Product Overview

Specifications

Dimensions

Trusted by our customers

Customer Reviews

Frequently Asked Questions

Does the Cosm High Back need manual adjustment? +

You can adjust the seat height to suit your desk and sitting position. The Auto-Harmonic Tilt automatically adapts recline resistance to your body and posture, so there is no manual tension setting to fine-tune.

What is the benefit of the Cosm High Back? +

The taller backrest extends support further up your back, making it a good option if you prefer more upper-back coverage when reclining. Its breathable mesh seat and back form a continuous surface that moves with you as you change position.

Are the Leaf Arms adjustable? +

Leaf Arms have a fixed position and do not offer manual height or width adjustment. Their curved mesh surfaces provide a broad resting area for your elbows. When choosing your chair, consider how the arm height will work with your desk and preferred sitting position.

Does Pro Furniture deliver across Australia? +

Yes. Pro Furniture delivers to Melbourne, Sydney, Brisbane and many regional locations across Australia. Delivery cost and timing depend on your postcode—contact us for a quick quote.

Can I try the chair before buying? +

Yes. Pro Furniture offers local inspection and trial options at selected locations. Please contact us before visiting the showroom so our team can confirm availability and arrange the trial for you.

What warranty does Pro Furniture provide on Herman Miller COSM, Sayl and Mirra 2 chairs? +

Warranty provided by Pro Furniture for up to 12 years.