How do I choose between low, medium and high?

By how long people sit and what the room is for. A low back keeps an open plan visually open and works at hot desks; a medium back is the everyday choice for a full day; a high back belongs where the chair is part of the room's register as much as its comfort, usually a director's office.

Is the high backrest simply taller?

No. The Executive version is built differently: the back is fully upholstered on an internal steel frame, over cold-foamed polyurethane padding, on a powder-coated die-cast aluminium seat base. Armrests in PA6 are optional on it.

Where is the lumbar support?

Inside the backrest, height adjustable, on the low and medium versions. Worth writing into a specification rather than assuming across the range.

Can I mix heights on one floor?

They share one design language, so medium backs at the desks and high backs in management do not look assembled from two catalogues. Coverings can differ room by room while the shell stays constant.

Does it work for shared desks?

The mechanism responds to the user's weight rather than a preset tension, and the recline locks in 3-degree steps, so a shared chair does not need resetting every morning.