Herman Miller Cosm High Back Chairs

The Herman Miller Cosm high back collection features an extended backrest for full upper-body coverage. Powered by the self adjusting auto-harmonic tilt mechanism for weightless recline support. Experience complete ergonomic freedom in custom finishes including graphite, glacier, nightfall and mineral, available with optional leaf arms or height adjustable options.

Herman Miller Cosm Graphite High Back Chair, Height Adjustable Arms

In stock

Herman Miller Cosm Graphite High Back Chair, Height Adjustable Arms

From:

£1,320.15 inc. VAT

herman-miller-cosm-high-back-white

Made to order

Herman Miller Cosm High Back Chair, Mineral and White, Height Adjustable Arms

From:

£1,389.70 inc. VAT

Available 28th October 2026

Herman Miller Cosm High back colour dipped glacier white

Made to order

Herman Miller Cosm Glacier High Back Chair, Leaf Arms

£1,487.20 inc. VAT

Herman Miller Cosm High Back Office Chair, Nightfall, Leaf Arms

Made to order

Herman Miller Cosm High Back Office Chair, Nightfall, Leaf Arms

£1,487.20 inc. VAT

Herman miller cosm mid back chair graphite leaf arms

Made to order

Herman Miler Cosm Graphite Mid Back Chair, Leaf Arms

From:

£1,277.90 inc. VAT

Herman Miller Cosm Canyon High Back Chair, Leaf Arms

In stock

Herman Miller Cosm Canyon High Back Chair, Leaf Arms

£1,487.20 inc. VAT

Why choose the high back Herman Miller Cosm chair?

While the Herman Miller Cosm series offers low, mid and high back options, the high back office chair configuration is built for maximum upper body support. The continuous backrest reaches up to the shoulders and lower neck making it the ideal choice for tall users, intensive desk based tasks or those who prefer to recline while working.

Key Features of the Cosm high back variation

Auto harmonic self adjusting tilt: The engineering core of the Cosm chair, a responsive mechanical gearbox beneath the seat measures your body mass and instantly sets the perfect tilt resistance. 

Continuous intercept suspension mesh: Breathable, temperature neutral elastomeric mesh spans seamlessly across the seat and backrest, eliminating pressure points and supporting your natural posture.  

Flexible polymeric frame: An ultra thin, dynamic frame flexes with your torso, allowing natural side to side movement without restriction. 

Dipped in colour finishes: Every element from the meat and frame to base and castors are uniform in colour, creating a seamless, modern aesthetic in Glacier, Nightfall, Canyon, Graphite and Mineral.     

Cosm Chair Options – Arms & Customisation   

Customise your Herman Miller Cosm high back chair to fit your workstation and ergonomic preference:

Leaf Arms: Studio 7.5’s iconic fixed, cradled arm design that supports your elbows comfortably without knocking against desk edges. 

Height Adjustable Arms: Versatile armrests that adjust up and down to align with various desk heights.

Fixed Arms: Sleep, structural arms offering stationary support. 

Armless: Compact and streamlined, ideal for tight workspaces or sliding completely beneath low desks.