Effortless comfort, fit and ergonomic support

Thoracic, Lumbar and Sacral support

Total back support

Many of Mirra's adjustments are passive, requiring no effort to operate. The patented TriFlex back, for example. This one-piece, pliable backrest naturally flexes and adjusts to your shape, height and motion.

The backrest features a passive PostureFit contour for superior lower-back support and comfort when you sit upright or forward at a computer.

Mirra is aerated so your skin temperature stays constant and moisture can move away from your body.

To support your entire back as you move throughout the day, the various geometric shapes in the TriFlex back create flex zones in the thoracic, lumbar and sacral regions.

Flex zones in the thoracic, lumbar and sacral zones

Moving in harmony

Harmonic tilt

The patented Harmonic tilt, developed with precision German engineering, gives everyone a smooth ride. You stay balanced as you change postures, from fully reclined to task intensive.

The Harmonic tilt mirrors the body's pivot points at the ankles, knees and hips so you can move easily and naturally throughout the tilt range. The geometry of the recline mechanism optimises the tilt spring tension according to the sitter's weight. That means it takes less effort to recline in the Mirra chair, regardless of your physical size.

Seat comfort with FlexFront and AireWeave material

Custom seat comfort

Mirra's seat adjusts itself the moment you sit down. The patented AireWeave material and Mirra's seat-suspension design conform to your contours and distribute weight evenly. The breathable material is engineered and woven to maintain its strength and responsiveness for the long run.

With its patented FlexFront seat edge, Mirra is the only chair that lets you incrementally adjust seat depth in five different positions without moving the seat.

Flexible fit

Mirra is a unique combination of passive and active adjustments. The chair immediately accepts you and adjusts to your body. Active, manual adjustments let you refine the support and feel. Mirra is great for one and great for many, fitting at least 95 percent of the world's population.

Adjustment Information from Herman Miller

View these Quicktime videos to learn about the ergonomic adjustment options available on Mirra chairs. Instructions shown are for all possible adjustments; specific adjustments vary according to chair model.

Seat Height (1.1MB), Seat Depth (1.3MB), Tilt Tension (1.2MB), Arm Height (1.4MB), Arm Angle (770KB), Arm Width (1.4MB), Lumbar (1.7MB), Forward Tilt (1.1MB), Tilt Limiter (1MB)

Or download this user adjustment document for a complete explanation of all your chair's bells and whistles: Mirra chair user information (pdf format)

Active adjustments Orange for active adjustments Passive adjustments Green for passive adjustments

Whole back support (passive adjustment) Armrest (active and passive adjustments) Forward seat angle (active and passive adjustments) Seat height (active adjustment) Seat depth (active adjustment)
  Armrest adjustments Forward seat angle Seat height Seat depth
Tilt tension (active and passive adjustments) Upper back area (passive adjustment) Tilt Limiter (active adjustment) Lumbar height and depth (active and passive adjustments)
Tilt tension   Tilt Limiter Lumbar height and depth


Mirra chair dimensions
a 432-483
b 406-546
c 686
d 111
e 502
All dimensions in millimetres.

For information about how to adjust your Mirra chair, please see the Mirra User Information (pdf format).