Rigid frame, which means it does not fold in the middle, which is the whole point of it — a rigid frame transmits more of your push into the ground instead of flexing, and that is the difference between twenty pushes down a corridor and thirty.

It was a proper thing.

I want to say that.

It was not junk.

It was an end-of-line display model of a genuinely good chair, aluminium, about nineteen pounds, with a sling back and a cushion in a box of its own, and if you had put it next to the chair Maya was sitting in you would have thought the old one was from a museum.

We put the rear wheels on, which is a quick-release axle and takes four seconds once you know.