Product details
- Brand
- Herman Miller
- Color / finish
- Black suspension; graphite frame and base
- Product type
- Ergonomic suspension task chair
Description
The Mirra 2 Butterfly back combines a fabric layer with a flexible polymer structure. It gives the chair a more upholstered back surface while retaining the responsive shape of Mirra 2. Below it, the AireWeave suspension seat provides an open sitting surface with a flexible front edge.
This configuration includes FlexFront seat-depth adjustment, adjustable lumbar support, adjustable arms and a tilt limiter. It suits buyers who want separate controls for seat fit and back support, along with a chair that accommodates changes between focused typing, conversation and reclining. The graphite frame keeps its sculpted form visually quiet.
Features
- Butterfly back: combines a fabric suspension layer and polymer support structure.
- FlexFront seat edge: changes usable seat depth by moving the front edge rather than sliding the whole seat.
- Adjustable lumbar: lets you position and tune the specified lower-back support.
- AireWeave seat: uses suspension material rather than a conventional foam cushion.
- Harmonic tilt: supports a coordinated transition between upright and reclined postures.
- Adjustable arms: bring the arm support toward your preferred working position.
Specifications
- Seat depth
- 16.2–18 in
- Back
- Butterfly suspension
- Seat edge
- FlexFront adjustable
| Model | Mirra 2 |
|---|---|
| Back type | Butterfly suspension back |
| Seat | AireWeave suspension |
| Seat-depth adjustment | FlexFront, approximately 16.2–18 in |
| Lumbar | Adjustable support |
| Arms | Adjustable |
| Tilt | Harmonic tilt with limiter |
| Frame and base | Graphite |
Fit the seat before adjusting the back
Start with your feet supported and your back against the chair. Use FlexFront to create space behind your knees, then adjust the lumbar support. A seat set too deep may encourage you to sit forward and lose contact with the backrest; too short may leave more of your thighs unsupported than you prefer.
| Butterfly back | Fabric-faced support with the flexible structure of Mirra 2. |
|---|---|
| TriFlex alternative | An exposed polymer back offered on other Mirra 2 configurations; it is a different surface from this Butterfly version. |
| Forward seat angle | A separate option in the Mirra 2 family. It is not specified for this tilt-limiter listing. |
| Desk clearance | Check the arm position and width at your actual working height before comparing overall chair dimensions. |
Common questions
How is Butterfly different from TriFlex?
Butterfly adds a fabric suspension layer to a polymer support structure. TriFlex uses an exposed perforated polymer back. Both belong to the Mirra 2 family, but the surface and feel differ.
Does the whole seat slide?
No. FlexFront changes the shape and position of the front seat edge. Squeeze the handle beneath the front, adjust the edge and release it to hold the chosen depth.
Is forward tilt included?
The supplied configuration specifies a tilt limiter. Forward seat angle is a separate option and is not promised here.
Is the lumbar support adjustable?
Yes, adjustable lumbar support is part of this listing. Set the chair height and seat depth first so you can assess the lumbar position with your back resting naturally against the chair.
Product information & sources
The supplied catalog identifies Butterfly back, adjustable lumbar, FlexFront and adjustable arms. Family documentation includes optional equipment; only the listed package is described. The gallery image was checked for the Butterfly back. Herman Miller: Mirra 2 back options and dimensions; Herman Miller: Mirra 2 adjustment guide; Herman Miller: Mirra 2 product overview. Reviewed September 2026.
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