Herman Miller Cosm Mid Back Chairs

The Ideal Balance: Why mid-back Cosm work chairs excel

Where high-back seating dominates a room and low-back models cater to temporary touch-down spots, the Cosm Mid Back hits the sweet spot for modern open-plan offices and home studios. It supports the crucial mid-thoracic and lumbar curve while keeping your shoulders free to reach, stretch, and collaborate.

Innovative Design & Performance

Self-Tuning Weight Calibration: The central Auto-Harmonic mechanism acts as an intuitive weight-balancing engine. As soon as you lean back, it automatically calculates the ideal counter-resistance without requiring you to reach for tension knobs or locking pins.

Pressure-Free Intercept Mesh: The single-piece elastomeric suspension system contours across your torso. The breathable weave vents body heat while maintaining uniform pressure distribution across the thighs and spine.

Responsive Flexible Back Shell: Studio 7.5 designed the frame with elastomeric flex zones, allowing the upper backrest to yield to your body whenever you twist or turn sideways.

Cohesive Monochromatic Finishes: From the top backrest trim down to the castors, each shade—such as Glacier, Nightfall, Canyon, or Graphite—is rendered in a single, continuous colour tone.

Selecting the Right Mid-Back Arm Setup

Depending on how you interact with your desk, the Cosm Mid Back offers four distinct arm configurations:

Leaf Arms: Cradles the forearms at a natural resting angle, avoiding contact with desk edges.

Height-Adjustable Arms: Allows vertical height fine-tuning to perfectly match varied desk heights.

Fixed Arms: Minimalist, sturdy frame arms designed for standard daily tasking.

Armless Variant: Creates an ultra-compact footprint that slides completely under low desks.

Cosm Mid Back Overview & Technical Details

Recommended Use: All-day desk tasking, hot-desking, home offices, and collaborative spaces.

Backrest Profile: Mid-back (supports lumbar to mid-spine).

Mechanism Type: Auto-Harmonic Self-Adjusting Tilt.

Suspension Material: Intercept Elastomeric Mesh.

Colour Palette: Graphite, Carbon, Mineral, Nightfall, Glacier, Canyon.

Weight Capacity: Up to 159 kg (25 Stone / 350 lbs).